diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/controller/ChatController.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/controller/ChatController.java
new file mode 100644
index 0000000..3ac984e
--- /dev/null
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/controller/ChatController.java
@@ -0,0 +1,34 @@
+package MathCaptain.weakness.domain.Chat.controller;
+
+import MathCaptain.weakness.domain.Chat.dto.request.ChatRequest;
+import MathCaptain.weakness.domain.Chat.dto.response.ChatResponse;
+import MathCaptain.weakness.domain.Chat.service.ChatService;
+import MathCaptain.weakness.domain.User.entity.Users;
+import MathCaptain.weakness.global.annotation.LoginUser;
+import lombok.RequiredArgsConstructor;
+import org.springframework.messaging.handler.annotation.MessageMapping;
+import org.springframework.messaging.simp.SimpMessagingTemplate;
+import org.springframework.web.bind.annotation.RestController;
+import java.util.List;
+
+@RestController
+@RequiredArgsConstructor
+public class ChatController {
+
+    private final SimpMessagingTemplate template;
+
+    private final ChatService chatService;
+
+    @MessageMapping("/chat.send")  // 클라이언트 → /app/chat.send
+    public void handleChat(ChatRequest request, @LoginUser Users loginUser) {
+        // 1) 유저 메시지 저장 + 클라이언트에게 에코
+        ChatResponse chatResponse = chatService.saveUserMessage(loginUser, request);
+        template.convertAndSend("/sub/" + loginUser.getUserId(), chatResponse);
+
+        // 2) LLM 호출 & 응답 저장 + 브로드캐스트 (동기 방식)
+        List<ChatResponse> llmResponses = chatService.askAI(loginUser, request);
+        llmResponses.forEach(aiResp ->
+            template.convertAndSend("/sub/" + loginUser.getUserId(), aiResp)
+        );
+    }
+}
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/dto/request/ChatRequest.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/dto/request/ChatRequest.java
new file mode 100644
index 0000000..c5878e5
--- /dev/null
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/dto/request/ChatRequest.java
@@ -0,0 +1,19 @@
+package MathCaptain.weakness.domain.Chat.dto.request;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+public class ChatRequest {
+
+    private String message;
+
+    private ChatRequest(String message) {
+        this.message = message;
+    }
+
+    public static ChatRequest of(String message) {
+        return new ChatRequest(message);
+    }
+}
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/dto/request/LLMRequest.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/dto/request/LLMRequest.java
new file mode 100644
index 0000000..90bde8d
--- /dev/null
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/dto/request/LLMRequest.java
@@ -0,0 +1,29 @@
+package MathCaptain.weakness.domain.Chat.dto.request;
+
+import MathCaptain.weakness.domain.Chat.entity.Chat;
+import MathCaptain.weakness.domain.User.entity.Users;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.util.List;
+
+@Getter
+@NoArgsConstructor
+public class LLMRequest {
+
+    private Long userId;
+
+    private String message;
+
+    private List<Chat> history;
+
+    private LLMRequest(Long userId, String message, List<Chat> history) {
+        this.userId = userId;
+        this.message = message;
+        this.history = history;
+    }
+
+    public static LLMRequest of(Users loginUser, ChatRequest request, List<Chat> history) {
+        return new LLMRequest(loginUser.getUserId(), request.getMessage(), history);
+    }
+}
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/dto/response/ChatResponse.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/dto/response/ChatResponse.java
new file mode 100644
index 0000000..b0f5a99
--- /dev/null
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/dto/response/ChatResponse.java
@@ -0,0 +1,37 @@
+package MathCaptain.weakness.domain.Chat.dto.response;
+
+import MathCaptain.weakness.domain.Chat.entity.Chat;
+import MathCaptain.weakness.domain.common.enums.ChatRole;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.time.LocalDateTime;
+
+@Getter
+@NoArgsConstructor
+public class ChatResponse {
+
+    private Long userId;
+
+    private ChatRole role;
+
+    private String message;
+
+    private LocalDateTime sendTime;
+
+    private ChatResponse(Long userId, ChatRole role, String message, LocalDateTime sendTime) {
+        this.userId = userId;
+        this.role = role;
+        this.message = message;
+        this.sendTime = sendTime;
+    }
+
+    public static ChatResponse of(Chat chat) {
+        return new ChatResponse(
+                chat.getUserId(),
+                chat.getRole(),
+                chat.getMessage(),
+                chat.getSendTime()
+        );
+    }
+}
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/entity/Chat.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/entity/Chat.java
index 63e71c5..fd6c95d 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/entity/Chat.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/entity/Chat.java
@@ -1,8 +1,12 @@
 package MathCaptain.weakness.domain.Chat.entity;
 
-import MathCaptain.weakness.domain.Chat.enums.ChatRole;
+import MathCaptain.weakness.domain.Chat.dto.request.ChatRequest;
+import MathCaptain.weakness.domain.Chat.dto.response.ChatResponse;
+import MathCaptain.weakness.domain.User.entity.Users;
+import MathCaptain.weakness.domain.common.enums.ChatRole;
 import jakarta.persistence.*;
 import lombok.AccessLevel;
+import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 import org.springframework.data.annotation.CreatedDate;
@@ -30,4 +34,23 @@ public class Chat {
     @CreatedDate
     @Column(updatable = false)
     private LocalDateTime sendTime;
+
+    @Builder
+    private Chat(Long userId, ChatRole role, String message) {
+        this.userId = userId;
+        this.role = role;
+        this.message = message;
+    }
+
+    public static Chat of(Users user, ChatRequest request, ChatRole role) {
+        return new Chat(user.getUserId(), role, request.getMessage());
+    }
+
+    public static Chat of(ChatResponse response) {
+        return Chat.builder()
+                .userId(response.getUserId())
+                .role(ChatRole.ASSISTANT)
+                .message(response.getMessage())
+                .build();
+    }
 }
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/repository/ChatRepository.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/repository/ChatRepository.java
index e996a51..83fc8de 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/repository/ChatRepository.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/repository/ChatRepository.java
@@ -4,6 +4,9 @@
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
+import java.util.List;
+
 @Repository
 public interface ChatRepository extends JpaRepository<Chat, Long> {
+    List<Chat> findAllByUserIdOrderBySendTimeAsc(Long userId);
 }
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/service/ChatService.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/service/ChatService.java
new file mode 100644
index 0000000..a5a35e2
--- /dev/null
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/service/ChatService.java
@@ -0,0 +1,44 @@
+package MathCaptain.weakness.domain.Chat.service;
+
+import MathCaptain.weakness.domain.Chat.dto.request.ChatRequest;
+import MathCaptain.weakness.domain.Chat.dto.response.ChatResponse;
+import MathCaptain.weakness.domain.Chat.entity.Chat;
+import MathCaptain.weakness.domain.Chat.repository.ChatRepository;
+import MathCaptain.weakness.domain.User.entity.Users;
+import MathCaptain.weakness.domain.common.enums.ChatRole;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+import java.util.UUID;
+
+@Service
+@RequiredArgsConstructor
+@Transactional(readOnly = true)
+public class ChatService {
+
+    public static final ChatRole USER = ChatRole.USER;
+    private final ChatRepository chatRepository;
+    private final LLMClient llm;
+
+    @Transactional
+    public ChatResponse saveUserMessage(Users loginUser, ChatRequest request) {
+        Chat message = Chat.of(loginUser, request, USER);
+        Chat saved = chatRepository.save(message);
+        return ChatResponse.of(saved);
+    }
+
+    public List<ChatResponse> askAI(Users loginUser, ChatRequest request) {
+        List<Chat> history = chatRepository.findAllByUserIdOrderBySendTimeAsc(loginUser.getUserId());
+        List<Chat> aiChats = llm.call(loginUser, history, request);
+        return aiChats.stream()
+                      .map(this::storeAndTransform)
+                      .toList();
+    }
+
+    private ChatResponse storeAndTransform(Chat message) {
+        Chat saved = chatRepository.save(message);
+        return ChatResponse.of(saved);
+    }
+}
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/service/LLMClient.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/service/LLMClient.java
new file mode 100644
index 0000000..dbbd4e2
--- /dev/null
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/service/LLMClient.java
@@ -0,0 +1,63 @@
+package MathCaptain.weakness.domain.Chat.service;
+
+import MathCaptain.weakness.domain.Chat.dto.request.ChatRequest;
+import MathCaptain.weakness.domain.Chat.dto.request.LLMRequest;
+import MathCaptain.weakness.domain.Chat.dto.response.ChatResponse;
+import MathCaptain.weakness.domain.Chat.entity.Chat;
+import MathCaptain.weakness.domain.User.entity.Users;
+import groovy.util.logging.Slf4j;
+import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Component;
+import org.springframework.web.client.HttpClientErrorException;
+import org.springframework.web.client.HttpServerErrorException;
+import org.springframework.web.client.ResourceAccessException;
+import org.springframework.web.client.RestTemplate;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Collectors;
+
+@lombok.extern.slf4j.Slf4j
+@Slf4j
+@Component
+@RequiredArgsConstructor
+public class LLMClient {
+
+    private final RestTemplate restTemplate;
+
+    @Value("${llm.server.url}")
+    private String baseUrl;
+
+    public List<Chat> call(Users loginUser, List<Chat> history, ChatRequest request) {
+        try {
+            LLMRequest llmRequest = LLMRequest.of(loginUser, request, history);
+
+            ResponseEntity<ChatResponse[]> response = restTemplate.postForEntity(
+                    // TODO : 엔드포인트 수정
+                    baseUrl + "/v1/chat",
+                    llmRequest,
+                    // 응답을 ChatResponse[] (배열)로 역직렬화 (수정 필요)
+                    ChatResponse[].class
+            );
+
+            ChatResponse[] body = response.getBody();
+            if (body == null) {
+                return Collections.emptyList();
+            }
+            return Arrays.stream(body)
+                    .map(Chat::of)
+                    .collect(Collectors.toList());
+
+        } catch (ResourceAccessException timeoutEx) {
+            log.error("LLM 서버 응답 지연", timeoutEx);
+            return List.of();
+        } catch (HttpClientErrorException | HttpServerErrorException httpEx) {
+            // 4XX/5XX 응답
+            log.error("LLM 호출 실패: {}", httpEx.getStatusCode(), httpEx);
+            return List.of();
+        }
+    }
+}
\ No newline at end of file
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/controller/GroupJoinController.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/controller/GroupJoinController.java
index 7576666..8504b11 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/controller/GroupJoinController.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/controller/GroupJoinController.java
@@ -1,7 +1,7 @@
 package MathCaptain.weakness.domain.Group.controller;
 
 import MathCaptain.weakness.domain.Group.dto.request.GroupJoinRequest;
-import MathCaptain.weakness.domain.Group.enums.RequestStatus;
+import MathCaptain.weakness.domain.common.enums.RequestStatus;
 import MathCaptain.weakness.domain.Group.service.GroupJoinService;
 import MathCaptain.weakness.domain.Group.service.RelationService;
 import MathCaptain.weakness.domain.Notification.service.NotificationService;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/request/GroupCreateRequest.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/request/GroupCreateRequest.java
index fef028d..76ab53f 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/request/GroupCreateRequest.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/request/GroupCreateRequest.java
@@ -1,6 +1,6 @@
 package MathCaptain.weakness.domain.Group.dto.request;
 
-import MathCaptain.weakness.domain.Group.enums.CategoryStatus;
+import MathCaptain.weakness.domain.common.enums.CategoryStatus;
 import jakarta.validation.constraints.NotNull;
 import jakarta.validation.constraints.Size;
 import lombok.*;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/response/GroupDetailResponse.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/response/GroupDetailResponse.java
index b6d7090..101be11 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/response/GroupDetailResponse.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/response/GroupDetailResponse.java
@@ -1,7 +1,7 @@
 package MathCaptain.weakness.domain.Group.dto.response;
 
 import MathCaptain.weakness.domain.Group.entity.Group;
-import MathCaptain.weakness.domain.Group.enums.CategoryStatus;
+import MathCaptain.weakness.domain.common.enums.CategoryStatus;
 import MathCaptain.weakness.domain.User.entity.Users;
 import lombok.*;
 
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/response/GroupMemberListResponse.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/response/GroupMemberListResponse.java
index b02f22a..ef53853 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/response/GroupMemberListResponse.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/response/GroupMemberListResponse.java
@@ -1,7 +1,7 @@
 package MathCaptain.weakness.domain.Group.dto.response;
 
 import MathCaptain.weakness.domain.Group.entity.RelationBetweenUserAndGroup;
-import MathCaptain.weakness.domain.Group.enums.GroupRole;
+import MathCaptain.weakness.domain.common.enums.GroupRole;
 import jakarta.validation.constraints.NotNull;
 import lombok.*;
 
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/response/GroupResponse.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/response/GroupResponse.java
index 6f2f902..07f173d 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/response/GroupResponse.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/response/GroupResponse.java
@@ -2,7 +2,7 @@
 
 import MathCaptain.weakness.domain.Group.entity.Group;
 import MathCaptain.weakness.domain.Group.entity.RelationBetweenUserAndGroup;
-import MathCaptain.weakness.domain.Group.enums.CategoryStatus;
+import MathCaptain.weakness.domain.common.enums.CategoryStatus;
 import MathCaptain.weakness.domain.User.entity.Users;
 import lombok.*;
 
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/response/RelationResponse.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/response/RelationResponse.java
index ae29c67..67b35d4 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/response/RelationResponse.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/response/RelationResponse.java
@@ -1,7 +1,7 @@
 package MathCaptain.weakness.domain.Group.dto.response;
 
 import MathCaptain.weakness.domain.Group.entity.RelationBetweenUserAndGroup;
-import MathCaptain.weakness.domain.Group.enums.GroupRole;
+import MathCaptain.weakness.domain.common.enums.GroupRole;
 import MathCaptain.weakness.domain.User.dto.response.UserResponse;
 import lombok.*;
 
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/response/UserGroupCardResponse.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/response/UserGroupCardResponse.java
index 2100441..d5a3bcb 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/response/UserGroupCardResponse.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/dto/response/UserGroupCardResponse.java
@@ -2,7 +2,7 @@
 
 import MathCaptain.weakness.domain.Group.entity.Group;
 import MathCaptain.weakness.domain.Group.entity.RelationBetweenUserAndGroup;
-import MathCaptain.weakness.domain.Group.enums.GroupRole;
+import MathCaptain.weakness.domain.common.enums.GroupRole;
 import lombok.*;
 
 import java.time.DayOfWeek;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/entity/Group.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/entity/Group.java
index 9eadf67..d798217 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/entity/Group.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/entity/Group.java
@@ -2,7 +2,7 @@
 
 import MathCaptain.weakness.domain.Group.dto.request.GroupCreateRequest;
 import MathCaptain.weakness.domain.Group.dto.request.GroupUpdateRequest;
-import MathCaptain.weakness.domain.Group.enums.CategoryStatus;
+import MathCaptain.weakness.domain.common.enums.CategoryStatus;
 import MathCaptain.weakness.domain.Recruitment.entity.Recruitment;
 import jakarta.persistence.*;
 import lombok.*;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/entity/RelationBetweenUserAndGroup.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/entity/RelationBetweenUserAndGroup.java
index de68e28..ae6150d 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/entity/RelationBetweenUserAndGroup.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/entity/RelationBetweenUserAndGroup.java
@@ -2,8 +2,8 @@
 
 import MathCaptain.weakness.domain.Group.dto.request.GroupCreateRequest;
 import MathCaptain.weakness.domain.Group.dto.request.GroupJoinRequest;
-import MathCaptain.weakness.domain.Group.enums.GroupRole;
-import MathCaptain.weakness.domain.Group.enums.RequestStatus;
+import MathCaptain.weakness.domain.common.enums.GroupRole;
+import MathCaptain.weakness.domain.common.enums.RequestStatus;
 import MathCaptain.weakness.domain.User.entity.Users;
 import jakarta.persistence.*;
 import lombok.*;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/repository/GroupRepository.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/repository/GroupRepository.java
index 9715b9a..c0f3215 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/repository/GroupRepository.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/repository/GroupRepository.java
@@ -1,7 +1,7 @@
 package MathCaptain.weakness.domain.Group.repository;
 
 import MathCaptain.weakness.domain.Group.entity.Group;
-import MathCaptain.weakness.domain.Group.enums.CategoryStatus;
+import MathCaptain.weakness.domain.common.enums.CategoryStatus;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.JpaRepository;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/repository/RelationRepository.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/repository/RelationRepository.java
index f29fb76..588bad0 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/repository/RelationRepository.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/repository/RelationRepository.java
@@ -2,8 +2,8 @@
 
 import MathCaptain.weakness.domain.Group.entity.Group;
 import MathCaptain.weakness.domain.Group.entity.RelationBetweenUserAndGroup;
-import MathCaptain.weakness.domain.Group.enums.GroupRole;
-import MathCaptain.weakness.domain.Group.enums.RequestStatus;
+import MathCaptain.weakness.domain.common.enums.GroupRole;
+import MathCaptain.weakness.domain.common.enums.RequestStatus;
 import MathCaptain.weakness.domain.User.entity.Users;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Query;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/service/GroupJoinService.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/service/GroupJoinService.java
index 6909e5a..93608ad 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/service/GroupJoinService.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/service/GroupJoinService.java
@@ -4,7 +4,7 @@
 import MathCaptain.weakness.domain.Group.entity.RelationBetweenUserAndGroup;
 import MathCaptain.weakness.domain.Group.dto.request.GroupJoinRequest;
 import MathCaptain.weakness.domain.Group.dto.response.GroupJoinResponse;
-import MathCaptain.weakness.domain.Group.enums.RequestStatus;
+import MathCaptain.weakness.domain.common.enums.RequestStatus;
 import MathCaptain.weakness.domain.Group.repository.GroupRepository;
 import MathCaptain.weakness.domain.Group.repository.RelationRepository;
 import MathCaptain.weakness.domain.User.entity.Users;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/service/GroupService.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/service/GroupService.java
index 00b601b..eb7865e 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/service/GroupService.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/service/GroupService.java
@@ -7,7 +7,7 @@
 import MathCaptain.weakness.domain.Group.dto.response.GroupDetailResponse;
 import MathCaptain.weakness.domain.Group.dto.response.GroupResponse;
 import MathCaptain.weakness.domain.Group.dto.response.UserGroupCardResponse;
-import MathCaptain.weakness.domain.Group.enums.CategoryStatus;
+import MathCaptain.weakness.domain.common.enums.CategoryStatus;
 import MathCaptain.weakness.domain.Record.service.RecordService;
 import MathCaptain.weakness.domain.User.dto.response.UserResponse;
 import MathCaptain.weakness.domain.Group.repository.GroupRepository;
@@ -15,7 +15,6 @@
 import MathCaptain.weakness.domain.User.entity.Users;
 import MathCaptain.weakness.global.Api.ApiResponse;
 import MathCaptain.weakness.global.exception.ResourceNotFoundException;
-import jakarta.servlet.http.HttpServletResponse;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/service/RelationService.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/service/RelationService.java
index 0a66c06..acdc46f 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/service/RelationService.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/service/RelationService.java
@@ -8,7 +8,7 @@
 import MathCaptain.weakness.domain.Group.repository.GroupRepository;
 import MathCaptain.weakness.domain.Record.repository.record.RecordRepository;
 import MathCaptain.weakness.domain.User.dto.response.UserResponse;
-import MathCaptain.weakness.domain.Group.enums.GroupRole;
+import MathCaptain.weakness.domain.common.enums.GroupRole;
 import MathCaptain.weakness.domain.Group.repository.RelationRepository;
 import MathCaptain.weakness.domain.User.entity.Users;
 import MathCaptain.weakness.global.Api.ApiResponse;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Notification/controller/NotificationController.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Notification/controller/NotificationController.java
index ae8c79e..c503dc0 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Notification/controller/NotificationController.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Notification/controller/NotificationController.java
@@ -23,11 +23,16 @@ public class NotificationController {
 
     @GetMapping("/notification/subscribe")
     public SseEmitter subscribe(@LoginUser Users loginUser) {
-        return notificationService.subscribe(loginUser.getUserId());
+        return notificationService.subscribe(loginUser);
     }
 
     @DeleteMapping("/notification/delete/{notificationId}")
     public ApiResponse<?> deleteNotification(@LoginUser Users loginUser, @PathVariable Long notificationId) {
         return notificationService.deleteNotification(loginUser, notificationId);
     }
-}
+
+    @GetMapping("/notification/list")
+    public ApiResponse<?> getNotificationList(@LoginUser Users loginUser) {
+        return notificationService.getNotificationList(loginUser);
+    }
+}
\ No newline at end of file
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Notification/dto/response/NotificationResponse.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Notification/dto/response/NotificationResponse.java
new file mode 100644
index 0000000..8a33002
--- /dev/null
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Notification/dto/response/NotificationResponse.java
@@ -0,0 +1,46 @@
+package MathCaptain.weakness.domain.Notification.dto.response;
+
+import MathCaptain.weakness.domain.Notification.entity.Notification;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.time.LocalDateTime;
+import java.util.List;
+import java.util.stream.Collectors;
+
+@Getter
+@NoArgsConstructor
+public class NotificationResponse {
+
+    private Long id;
+    private String sender;
+    private String content;
+    private LocalDateTime createdAt;
+    private Boolean isRead;
+
+    @Builder
+    public NotificationResponse(Long id, String sender, String content, LocalDateTime createdAt, Boolean isRead) {
+        this.id = id;
+        this.sender = sender;
+        this.content = content;
+        this.createdAt = createdAt;
+        this.isRead = isRead;
+    }
+
+    public static NotificationResponse from(Notification notification) {
+        return NotificationResponse.builder()
+                .id(notification.getId())
+                .sender(notification.getSender())
+                .content(notification.getContent())
+                .createdAt(notification.getCreatedAt())
+                .isRead(notification.getIsRead())
+                .build();
+    }
+
+    public static List<NotificationResponse> fromList(List<Notification> notifications) {
+        return notifications.stream()
+                .map(NotificationResponse::from)
+                .collect(Collectors.toList());
+    }
+}
\ No newline at end of file
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Notification/entity/Notification.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Notification/entity/Notification.java
index 641e9b9..a0bc3db 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Notification/entity/Notification.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Notification/entity/Notification.java
@@ -18,6 +18,8 @@ public class Notification {
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
 
+    private Long userId;
+
     @Column(nullable = false)
     private String sender;
 
@@ -25,20 +27,24 @@ public class Notification {
     private LocalDateTime createdAt;
 
     @Column(nullable = false)
-    private String contents;
+    private String content;
+
+    private Boolean isRead;
 
     @Builder
-    private Notification(String sender, LocalDateTime createdAt, String contents) {
+    private Notification(Long userId, String sender, LocalDateTime createdAt, String content) {
+        this.userId = userId;
         this.sender = sender;
         this.createdAt = createdAt;
-        this.contents = contents;
+        this.content = content;
+        this.isRead = false;
     }
 
     public static Notification of(Map<String, String> eventData) {
         return Notification.builder()
+                .userId(Long.parseLong(eventData.get("userId")))
                 .sender(eventData.get("sender"))
-                .createdAt(LocalDateTime.parse(eventData.get("createdAt")))
-                .contents(eventData.get("message"))
+                .content(eventData.get("message"))
                 .build();
     }
 }
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Notification/repository/NotificationRepository.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Notification/repository/NotificationRepository.java
index c107b2c..4f0020e 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Notification/repository/NotificationRepository.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Notification/repository/NotificationRepository.java
@@ -3,8 +3,11 @@
 import MathCaptain.weakness.domain.Notification.entity.Notification;
 import org.springframework.data.jpa.repository.JpaRepository;
 
+import java.util.List;
 import java.util.Optional;
 
 public interface NotificationRepository extends JpaRepository<Notification, Long> {
     Optional<Notification> findById(Long id);
+
+    List<Notification> findAllByUserIdOrderByCreatedAtDesc(Long userId);
 }
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Notification/service/NotificationService.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Notification/service/NotificationService.java
index 8b373c1..99566f2 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Notification/service/NotificationService.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Notification/service/NotificationService.java
@@ -5,6 +5,7 @@
 import MathCaptain.weakness.domain.Group.repository.GroupRepository;
 import MathCaptain.weakness.domain.Group.repository.RelationRepository;
 import MathCaptain.weakness.domain.Notification.controller.NotificationController;
+import MathCaptain.weakness.domain.Notification.dto.response.NotificationResponse;
 import MathCaptain.weakness.domain.Notification.entity.Notification;
 import MathCaptain.weakness.domain.Notification.repository.NotificationRepository;
 import MathCaptain.weakness.domain.Recruitment.entity.Comment;
@@ -20,6 +21,7 @@
 import java.io.IOException;
 import java.time.LocalDateTime;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
 @Service
@@ -36,7 +38,8 @@ public class NotificationService {
 
 
     // 메시지 알림
-    public SseEmitter subscribe(Long userId) {
+    public SseEmitter subscribe(Users user) {
+        Long userId = user.getUserId();
         SseEmitter sseEmitter = new SseEmitter(Long.MAX_VALUE);
         try {
             sseEmitter.send(SseEmitter.event().name("connect"));
@@ -60,7 +63,7 @@ public void notifyComment(Long recruitmentId, Long commentId) {
         if (NotificationController.sseEmitters.containsKey(userId)) {
             SseEmitter sseEmitter = NotificationController.sseEmitters.get(userId);
             try {
-                Map<String, String> eventData = buildNotificationData("댓글이 달렸습니다.", comment.getAuthor().getNickname(), comment.getCommentTime().toString(), comment.getContent());
+                Map<String, String> eventData = buildNotificationData("댓글이 달렸습니다.", comment.getAuthor().getUserId(), comment.getAuthor().getNickname(), comment.getCommentTime().toString(), comment.getContent());
                 sseEmitter.send(SseEmitter.event().name("addComment").data(eventData));
                 Notification notification = Notification.of(eventData);
                 notificationRepository.save(notification);
@@ -83,7 +86,7 @@ public void notifyGroupJoinRequest(Long groupId, Users user) {
         if (NotificationController.sseEmitters.containsKey(leaderId)) {
             SseEmitter sseEmitter = NotificationController.sseEmitters.get(leaderId);
             try {
-                Map<String,String> eventData = buildNotificationData("그룹 가입 요청이 있습니다.", user.getNickname(), LocalDateTime.now().toString(), "가입 요청");
+                Map<String,String> eventData = buildNotificationData("그룹 가입 요청이 있습니다.", leaderId ,user.getNickname(), LocalDateTime.now().toString(), "가입 요청");
                 sseEmitter.send(SseEmitter.event().name("groupJoinRequest").data(eventData));
                 // DB 저장
                 Notification notification = Notification.of(eventData);
@@ -107,7 +110,7 @@ public void notifyGroupJoinResult(Long groupId, Users user) {
         if (NotificationController.sseEmitters.containsKey(userId)) {
             SseEmitter sseEmitter = NotificationController.sseEmitters.get(userId);
             try {
-                Map<String,String> eventData = buildNotificationData("그룹 가입 요청 결과가 도착했습니다.", group.getName(), LocalDateTime.now().toString(), relation.getRequestStatus().toString());
+                Map<String,String> eventData = buildNotificationData("그룹 가입 요청 결과가 도착했습니다.", userId ,group.getName(), LocalDateTime.now().toString(), relation.getRequestStatus().toString());
                 sseEmitter.send(SseEmitter.event().name("groupJoinResult").data(eventData));
                 // DB 저장
                 Notification notification = Notification.of(eventData);
@@ -144,8 +147,16 @@ public ApiResponse<?> deleteNotification(Users loginUser, Long notificationId) {
         return ApiResponse.ok("알림이 삭제되었습니다.");
     }
 
-    private Map<String, String> buildNotificationData(String message, String sender, String createdAt, String contents) {
+    public ApiResponse<?> getNotificationList(Users user) {
+        Long userId = user.getUserId();
+        List<Notification> notifications = notificationRepository.findAllByUserIdOrderByCreatedAtDesc(userId);
+        return ApiResponse.ok(NotificationResponse.fromList(notifications));
+    }
+
+    private Map<String, String> buildNotificationData(String message, Long userId, String sender, String createdAt, String contents) {
         Map<String, String> eventData = new HashMap<>();
+        eventData.put("userId", userId.toString());
+        eventData.put("userName", String.valueOf(sender));
         eventData.put("message", message);
         eventData.put("sender", sender);
         eventData.put("createdAt", createdAt);
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Record/controller/RecordController.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Record/controller/RecordController.java
index b64b2a4..2a909a5 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Record/controller/RecordController.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Record/controller/RecordController.java
@@ -1,7 +1,6 @@
 package MathCaptain.weakness.domain.Record.controller;
 
 import MathCaptain.weakness.domain.Record.dto.request.FitnessLogEnrollRequest;
-import MathCaptain.weakness.domain.Record.dto.request.RecordEndRequest;
 import MathCaptain.weakness.domain.Record.dto.request.RunningLogEnrollRequest;
 import MathCaptain.weakness.domain.Record.dto.request.StudyLogEnrollRequest;
 import MathCaptain.weakness.domain.Record.dto.response.RecordSummaryResponse;
@@ -13,7 +12,7 @@
 import lombok.RequiredArgsConstructor;
 import org.springframework.web.bind.annotation.*;
 
-import static MathCaptain.weakness.domain.Group.enums.CategoryStatus.*;
+import static MathCaptain.weakness.domain.common.enums.CategoryStatus.*;
 
 @RestController
 @RequiredArgsConstructor
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Record/service/RecordService.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Record/service/RecordService.java
index 3b9c520..3812f77 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Record/service/RecordService.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Record/service/RecordService.java
@@ -2,7 +2,7 @@
 
 import MathCaptain.weakness.domain.Group.entity.Group;
 import MathCaptain.weakness.domain.Group.entity.RelationBetweenUserAndGroup;
-import MathCaptain.weakness.domain.Group.enums.CategoryStatus;
+import MathCaptain.weakness.domain.common.enums.CategoryStatus;
 import MathCaptain.weakness.domain.Group.repository.RelationRepository;
 import MathCaptain.weakness.domain.Record.dto.request.*;
 import MathCaptain.weakness.domain.Record.dto.response.FitnessLogResponse;
@@ -10,9 +10,6 @@
 import MathCaptain.weakness.domain.Record.dto.response.StudyLogResponse;
 import MathCaptain.weakness.domain.Record.entity.ActivityRecord;
 import MathCaptain.weakness.domain.Record.dto.response.RecordSummaryResponse;
-import MathCaptain.weakness.domain.Record.entity.UserLog.FitnessDetail;
-import MathCaptain.weakness.domain.Record.entity.UserLog.RunningDetail;
-import MathCaptain.weakness.domain.Record.entity.UserLog.StudyDetail;
 import MathCaptain.weakness.domain.Record.repository.record.RecordRepository;
 import MathCaptain.weakness.domain.User.entity.Users;
 import MathCaptain.weakness.global.PointSet;
@@ -22,14 +19,11 @@
 import org.springframework.transaction.annotation.Transactional;
 
 import java.time.DayOfWeek;
-import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.time.temporal.TemporalAdjusters;
 import java.util.*;
 import java.util.stream.Collectors;
 
-import static MathCaptain.weakness.domain.Group.enums.CategoryStatus.*;
-
 @Slf4j
 @Service
 @Transactional
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/dto/request/UpdateRecruitmentRequest.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/dto/request/UpdateRecruitmentRequest.java
index 459fc97..04d9401 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/dto/request/UpdateRecruitmentRequest.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/dto/request/UpdateRecruitmentRequest.java
@@ -1,6 +1,6 @@
 package MathCaptain.weakness.domain.Recruitment.dto.request;
 
-import MathCaptain.weakness.domain.Recruitment.enums.RecruitmentStatus;
+import MathCaptain.weakness.domain.common.enums.RecruitmentStatus;
 import jakarta.validation.constraints.NotEmpty;
 import jakarta.validation.constraints.NotNull;
 import jakarta.validation.constraints.Size;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/dto/response/RecruitmentDetailResponse.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/dto/response/RecruitmentDetailResponse.java
index 2459ca3..61cd81e 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/dto/response/RecruitmentDetailResponse.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/dto/response/RecruitmentDetailResponse.java
@@ -1,8 +1,8 @@
 package MathCaptain.weakness.domain.Recruitment.dto.response;
 
-import MathCaptain.weakness.domain.Group.enums.CategoryStatus;
+import MathCaptain.weakness.domain.common.enums.CategoryStatus;
 import MathCaptain.weakness.domain.Recruitment.entity.Recruitment;
-import MathCaptain.weakness.domain.Recruitment.enums.RecruitmentStatus;
+import MathCaptain.weakness.domain.common.enums.RecruitmentStatus;
 import MathCaptain.weakness.domain.User.entity.Users;
 import lombok.*;
 
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/dto/response/RecruitmentResponse.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/dto/response/RecruitmentResponse.java
index 6f4bea7..5ab396c 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/dto/response/RecruitmentResponse.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/dto/response/RecruitmentResponse.java
@@ -1,8 +1,8 @@
 package MathCaptain.weakness.domain.Recruitment.dto.response;
 
-import MathCaptain.weakness.domain.Group.enums.CategoryStatus;
+import MathCaptain.weakness.domain.common.enums.CategoryStatus;
 import MathCaptain.weakness.domain.Recruitment.entity.Recruitment;
-import MathCaptain.weakness.domain.Recruitment.enums.RecruitmentStatus;
+import MathCaptain.weakness.domain.common.enums.RecruitmentStatus;
 import lombok.*;
 
 import java.time.LocalDateTime;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/entity/Recruitment.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/entity/Recruitment.java
index 8f907b4..a7c35c9 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/entity/Recruitment.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/entity/Recruitment.java
@@ -1,10 +1,10 @@
 package MathCaptain.weakness.domain.Recruitment.entity;
 
 import MathCaptain.weakness.domain.Group.entity.Group;
-import MathCaptain.weakness.domain.Group.enums.CategoryStatus;
+import MathCaptain.weakness.domain.common.enums.CategoryStatus;
 import MathCaptain.weakness.domain.Recruitment.dto.request.CreateRecruitmentRequest;
 import MathCaptain.weakness.domain.Recruitment.dto.request.UpdateRecruitmentRequest;
-import MathCaptain.weakness.domain.Recruitment.enums.RecruitmentStatus;
+import MathCaptain.weakness.domain.common.enums.RecruitmentStatus;
 import MathCaptain.weakness.domain.User.entity.Users;
 import jakarta.persistence.*;
 import jakarta.validation.constraints.NotNull;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/service/RecruitmentService.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/service/RecruitmentService.java
index 343815b..f1e9c1d 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/service/RecruitmentService.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/service/RecruitmentService.java
@@ -2,7 +2,7 @@
 
 import MathCaptain.weakness.domain.Group.entity.Group;
 import MathCaptain.weakness.domain.Group.entity.RelationBetweenUserAndGroup;
-import MathCaptain.weakness.domain.Group.enums.GroupRole;
+import MathCaptain.weakness.domain.common.enums.GroupRole;
 import MathCaptain.weakness.domain.Group.repository.GroupRepository;
 import MathCaptain.weakness.domain.Group.repository.RelationRepository;
 import MathCaptain.weakness.domain.Recruitment.dto.response.*;
@@ -19,7 +19,6 @@
 import org.springframework.transaction.annotation.Transactional;
 
 import java.util.List;
-import java.util.Optional;
 
 @Service
 @Slf4j
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/Login/LoginSuccessJWTProvideHandler.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/Login/LoginSuccessJWTProvideHandler.java
index cf93c87..fed79ce 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/Login/LoginSuccessJWTProvideHandler.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/Login/LoginSuccessJWTProvideHandler.java
@@ -16,6 +16,7 @@
 import org.springframework.security.web.authentication.SimpleUrlAuthenticationSuccessHandler;
 
 import java.io.IOException;
+import java.util.Map;
 
 @Slf4j
 @RequiredArgsConstructor
@@ -40,13 +41,28 @@ public void onAuthenticationSuccess(HttpServletRequest request, HttpServletRespo
                 user -> user.updateRefreshToken(refreshToken)
         );
 
-        // TODO
-        // 사용자의 그룹 정보 조회를 리다이렉트를 이용하여 옮기는 것이 좋아보임
+        userRepository.findByEmail(email).ifPresent(user -> {
+            try {
+                var responseBody = objectMapper.writeValueAsString(Map.of(
+                        "status", true,
+                        "message", "로그인 성공",
+                        "data", Map.of(
+                                "userId", user.getUserId(),
+                                "email", email
+                        )
+                ));
 
-        // JSON 응답 설정 및 전송
-        response.setContentType("application/json");
-        response.setCharacterEncoding("UTF-8");
-        response.setStatus(HttpServletResponse.SC_OK);
+                // JSON 응답 설정 및 전송
+                response.setContentType("application/json");
+                response.setCharacterEncoding("UTF-8");
+                response.setStatus(HttpServletResponse.SC_OK);
+                response.getWriter().write(responseBody);
+
+            } catch (IOException e) {
+                log.error("❌JSON 응답 실패", e);
+                throw new RuntimeException(e);
+            }
+        });
 
         log.info( "✅ 로그인에 성공합니다. 📧email: {}" , email);
     }
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/dto/response/UserCardResponse.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/dto/response/UserCardResponse.java
index 46011a4..ed0f170 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/dto/response/UserCardResponse.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/dto/response/UserCardResponse.java
@@ -2,7 +2,7 @@
 
 import MathCaptain.weakness.domain.Group.dto.response.UserGroupCardResponse;
 import MathCaptain.weakness.domain.User.entity.Users;
-import MathCaptain.weakness.domain.User.enums.Tiers;
+import MathCaptain.weakness.domain.common.enums.Tiers;
 import lombok.*;
 
 import java.util.List;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/dto/response/UserResponse.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/dto/response/UserResponse.java
index 3bdcefd..3d42e3f 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/dto/response/UserResponse.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/dto/response/UserResponse.java
@@ -3,7 +3,7 @@
 import MathCaptain.weakness.domain.Group.dto.response.GroupResponse;
 import MathCaptain.weakness.domain.Group.entity.RelationBetweenUserAndGroup;
 import MathCaptain.weakness.domain.User.entity.Users;
-import MathCaptain.weakness.domain.User.enums.Tiers;
+import MathCaptain.weakness.domain.common.enums.Tiers;
 import lombok.*;
 
 import java.util.List;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/entity/Users.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/entity/Users.java
index 9885555..891b416 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/entity/Users.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/entity/Users.java
@@ -5,8 +5,8 @@
 import MathCaptain.weakness.domain.Recruitment.entity.Recruitment;
 import MathCaptain.weakness.domain.User.dto.request.SaveUserRequest;
 import MathCaptain.weakness.domain.User.dto.request.UpdateUserRequest;
-import MathCaptain.weakness.domain.User.enums.TierThresholds;
-import MathCaptain.weakness.domain.User.enums.Tiers;
+import MathCaptain.weakness.domain.common.TierThresholds;
+import MathCaptain.weakness.domain.common.enums.Tiers;
 import jakarta.persistence.*;
 import lombok.*;
 import org.hibernate.validator.constraints.Range;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/enums/TierThresholds.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/TierThresholds.java
similarity index 90%
rename from MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/enums/TierThresholds.java
rename to MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/TierThresholds.java
index 9c4f49e..e2f30c1 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/enums/TierThresholds.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/TierThresholds.java
@@ -1,4 +1,4 @@
-package MathCaptain.weakness.domain.User.enums;
+package MathCaptain.weakness.domain.common;
 
 public class TierThresholds {
     public static final long BRONZE = 0;         // 기본값
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/enums/CategoryStatus.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/enums/CategoryStatus.java
similarity index 93%
rename from MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/enums/CategoryStatus.java
rename to MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/enums/CategoryStatus.java
index bc3e9d6..eecb388 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/enums/CategoryStatus.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/enums/CategoryStatus.java
@@ -1,4 +1,4 @@
-package MathCaptain.weakness.domain.Group.enums;
+package MathCaptain.weakness.domain.common.enums;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonValue;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/enums/ChatRole.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/enums/ChatRole.java
similarity index 50%
rename from MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/enums/ChatRole.java
rename to MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/enums/ChatRole.java
index ae9ea9b..e1f9cac 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Chat/enums/ChatRole.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/enums/ChatRole.java
@@ -1,4 +1,4 @@
-package MathCaptain.weakness.domain.Chat.enums;
+package MathCaptain.weakness.domain.common.enums;
 
 public enum ChatRole {
     USER,
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/enums/GroupRole.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/enums/GroupRole.java
similarity index 93%
rename from MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/enums/GroupRole.java
rename to MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/enums/GroupRole.java
index 35519b7..e109ba1 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/enums/GroupRole.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/enums/GroupRole.java
@@ -1,4 +1,4 @@
-package MathCaptain.weakness.domain.Group.enums;
+package MathCaptain.weakness.domain.common.enums;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonValue;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/enums/RecruitmentStatus.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/enums/RecruitmentStatus.java
similarity index 93%
rename from MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/enums/RecruitmentStatus.java
rename to MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/enums/RecruitmentStatus.java
index be98488..50b5362 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Recruitment/enums/RecruitmentStatus.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/enums/RecruitmentStatus.java
@@ -1,4 +1,4 @@
-package MathCaptain.weakness.domain.Recruitment.enums;
+package MathCaptain.weakness.domain.common.enums;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonValue;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/enums/RequestStatus.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/enums/RequestStatus.java
similarity index 94%
rename from MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/enums/RequestStatus.java
rename to MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/enums/RequestStatus.java
index 34ee4b2..c85b093 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/Group/enums/RequestStatus.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/enums/RequestStatus.java
@@ -1,4 +1,4 @@
-package MathCaptain.weakness.domain.Group.enums;
+package MathCaptain.weakness.domain.common.enums;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonValue;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/enums/Tiers.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/enums/Tiers.java
similarity index 94%
rename from MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/enums/Tiers.java
rename to MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/enums/Tiers.java
index da118c0..68fdefa 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/User/enums/Tiers.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/domain/common/enums/Tiers.java
@@ -1,4 +1,4 @@
-package MathCaptain.weakness.domain.User.enums;
+package MathCaptain.weakness.domain.common.enums;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonValue;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/auth/filter/GroupRoleFilter.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/auth/filter/GroupRoleFilter.java
index b26db30..3ea9a32 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/auth/filter/GroupRoleFilter.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/auth/filter/GroupRoleFilter.java
@@ -1,7 +1,7 @@
 package MathCaptain.weakness.global.auth.filter;
 
 import MathCaptain.weakness.domain.Group.entity.RelationBetweenUserAndGroup;
-import MathCaptain.weakness.domain.Group.enums.GroupRole;
+import MathCaptain.weakness.domain.common.enums.GroupRole;
 import MathCaptain.weakness.domain.Group.repository.RelationRepository;
 import MathCaptain.weakness.domain.Recruitment.entity.Comment;
 import MathCaptain.weakness.domain.Recruitment.repository.CommentRepository;
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/auth/jwt/JwtService.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/auth/jwt/JwtService.java
index b93db47..7445573 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/auth/jwt/JwtService.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/auth/jwt/JwtService.java
@@ -2,6 +2,7 @@
 
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
+import org.springframework.security.core.Authentication;
 
 import java.io.IOException;
 import java.util.List;
@@ -33,4 +34,5 @@ public interface JwtService {
 
     boolean isTokenValid(String token);
 
+    Authentication getAuthentication(String token);
 }
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/auth/jwt/JwtServiceImpl.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/auth/jwt/JwtServiceImpl.java
index a07d854..ede92df 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/auth/jwt/JwtServiceImpl.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/auth/jwt/JwtServiceImpl.java
@@ -12,6 +12,9 @@
 import lombok.Setter;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
+import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
 import org.springframework.stereotype.Service;
 
 import java.io.IOException;
@@ -216,5 +219,17 @@ public boolean isTokenValid(String token) {
         }
     }
 
+    @Override
+    public Authentication getAuthentication(String accessToken) {
+        log.info("Authentication 추출");
+        return extractEmail(accessToken)
+                .map(email -> new UsernamePasswordAuthenticationToken(
+                        email,
+                        null,
+                        List.of(new SimpleGrantedAuthority("ROLE_USER"))
+                ))
+                .orElseThrow(() -> new RuntimeException("유효하지 않은 토큰입니다."));
+    }
+
 }
 
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/config/AppConfig.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/config/AppConfig.java
new file mode 100644
index 0000000..9c52800
--- /dev/null
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/config/AppConfig.java
@@ -0,0 +1,23 @@
+package MathCaptain.weakness.global.config;
+
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.client.RestTemplate;
+
+import java.time.Duration;
+
+@Configuration
+public class AppConfig {
+    /**
+     * RestTemplate을 빈으로 등록합니다.
+     * 다른 컴포넌트에서 @Autowired 또는 생성자 주입으로 사용 가능합니다.
+     */
+    @Bean
+    public RestTemplate restTemplate(RestTemplateBuilder builder) {
+        return builder
+                .setConnectTimeout(Duration.ofSeconds(10))
+                .setReadTimeout(Duration.ofSeconds(30))
+                .build();
+    }
+}
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/config/WebSocketConfig.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/config/WebSocketConfig.java
index 2442bfe..b3322ec 100644
--- a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/config/WebSocketConfig.java
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/config/WebSocketConfig.java
@@ -12,6 +12,8 @@
 @EnableWebSocketMessageBroker
 public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {
 
+    private final WebSocketInterceptor webSocketInterceptor;
+
     @Override
     public void configureMessageBroker(MessageBrokerRegistry registry) {
         registry.setApplicationDestinationPrefixes("/send");       //클라이언트에서 보낸 메세지를 받을 prefix
@@ -20,7 +22,9 @@ public void configureMessageBroker(MessageBrokerRegistry registry) {
 
     @Override
     public void registerStompEndpoints(StompEndpointRegistry registry) {
-        registry.addEndpoint("/ws-stomp").setAllowedOriginPatterns("*").withSockJS();
+        registry.addEndpoint("/ws-stomp")
+                .setAllowedOriginPatterns("*")
+                .addInterceptors(webSocketInterceptor) // ⬅️ interceptor 등록
+                .withSockJS();
     }
-
 }
diff --git a/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/config/WebSocketInterceptor.java b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/config/WebSocketInterceptor.java
new file mode 100644
index 0000000..d14d9f4
--- /dev/null
+++ b/MathCaptain/weakness/src/main/java/MathCaptain/weakness/global/config/WebSocketInterceptor.java
@@ -0,0 +1,57 @@
+package MathCaptain.weakness.global.config;
+
+import lombok.RequiredArgsConstructor;
+import MathCaptain.weakness.global.auth.jwt.JwtService;
+import MathCaptain.weakness.domain.User.repository.UserRepository;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.server.ServerHttpRequest;
+import org.springframework.http.server.ServerHttpResponse;
+import org.springframework.http.server.ServletServerHttpRequest;
+import org.springframework.stereotype.Component;
+import org.springframework.web.socket.WebSocketHandler;
+import org.springframework.web.socket.server.HandshakeInterceptor;
+import org.springframework.security.core.context.SecurityContextHolder;
+
+import java.util.Map;
+
+@Slf4j
+@Component
+@RequiredArgsConstructor
+public class WebSocketInterceptor implements HandshakeInterceptor {
+
+    private final JwtService jwtService;
+    private final UserRepository userRepository;
+
+    @Override
+    public boolean beforeHandshake(
+            ServerHttpRequest request,
+            ServerHttpResponse response,
+            WebSocketHandler wsHandler,
+            Map<String, Object> attributes
+    ) throws Exception {
+        if (request instanceof ServletServerHttpRequest servletRequest) {
+            String authHeader = servletRequest.getServletRequest().getHeader("Authorization");
+
+            if (authHeader != null && authHeader.startsWith("Bearer ")) {
+                String token = authHeader.substring(7);
+
+                log.info("===== 토큰 유효성 검사(ws) =====");
+                if (jwtService.isTokenValid(token)) {
+                    log.info("유효성 검사 통과 ✅");
+                    var authentication = jwtService.getAuthentication(token);
+                    SecurityContextHolder.getContext().setAuthentication(authentication);
+                    attributes.put("user", authentication); // 나중에 메시지에서 접근 가능
+                }
+            }
+        }
+        return true;
+    }
+
+    @Override
+    public void afterHandshake(ServerHttpRequest request,
+                               ServerHttpResponse response,
+                               WebSocketHandler wsHandler,
+                               Exception exception) {
+        // 없음
+    }
+}
\ No newline at end of file