diff --git a/src/main/java/server/poptato/auth/exception/AuthException.java b/src/main/java/server/poptato/auth/exception/AuthException.java
new file mode 100644
index 0000000..920e6dc
--- /dev/null
+++ b/src/main/java/server/poptato/auth/exception/AuthException.java
@@ -0,0 +1,14 @@
+package server.poptato.auth.exception;
+
+import lombok.Getter;
+import server.poptato.global.response.status.ResponseStatus;
+
+@Getter
+public class AuthException extends RuntimeException{
+    private final ResponseStatus exceptionStatus;
+
+    public AuthException(ResponseStatus exceptionStatus) {
+        super(exceptionStatus.getMessage());
+        this.exceptionStatus = exceptionStatus;
+    }
+}
diff --git a/src/main/java/server/poptato/auth/exception/errorcode/AuthExceptionErrorCode.java b/src/main/java/server/poptato/auth/exception/errorcode/AuthExceptionErrorCode.java
new file mode 100644
index 0000000..9f25121
--- /dev/null
+++ b/src/main/java/server/poptato/auth/exception/errorcode/AuthExceptionErrorCode.java
@@ -0,0 +1,37 @@
+package server.poptato.auth.exception.errorcode;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpStatus;
+import server.poptato.global.response.status.ResponseStatus;
+
+@RequiredArgsConstructor
+public enum AuthExceptionErrorCode implements ResponseStatus {
+
+    /**
+     * 6000: Auth 도메인 오류
+     */
+
+    TOKEN_NOT_EXIST(6000, HttpStatus.BAD_REQUEST.value(), "토큰 값이 필요합니다."),
+    TOKEN_TIME_EXPIRED(6001, HttpStatus.BAD_REQUEST.value(), "토큰이 만료되었습니다"),
+    INVALID_TOKEN(6002, HttpStatus.BAD_REQUEST.value(), "토큰이 유효하지 않습니다");
+
+    private final int code;
+    private final int status;
+    private final String message;
+
+
+    @Override
+    public int getCode() {
+        return code;
+    }
+
+    @Override
+    public int getStatus() {
+        return status;
+    }
+
+    @Override
+    public String getMessage() {
+        return message;
+    }
+}
diff --git a/src/main/java/server/poptato/auth/exception/handler/AuthExceptionHandler.java b/src/main/java/server/poptato/auth/exception/handler/AuthExceptionHandler.java
new file mode 100644
index 0000000..9b928a1
--- /dev/null
+++ b/src/main/java/server/poptato/auth/exception/handler/AuthExceptionHandler.java
@@ -0,0 +1,22 @@
+package server.poptato.auth.exception.handler;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.core.annotation.Order;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+import server.poptato.auth.exception.AuthException;
+import server.poptato.global.response.BaseErrorResponse;
+
+@Slf4j
+@Order(0)
+@RestControllerAdvice
+public class AuthExceptionHandler {
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    @ExceptionHandler(AuthException.class)
+    public BaseErrorResponse handleAuthException(AuthException e) {
+        log.error("[UserException: handle_UserException 호출]", e);
+        return new BaseErrorResponse(e.getExceptionStatus(), e.getMessage());
+    }
+}
diff --git a/src/main/java/server/poptato/user/api/UserController.java b/src/main/java/server/poptato/user/api/UserController.java
index bbe2bf2..056de09 100644
--- a/src/main/java/server/poptato/user/api/UserController.java
+++ b/src/main/java/server/poptato/user/api/UserController.java
@@ -1,10 +1,10 @@
 package server.poptato.user.api;
 
 import lombok.RequiredArgsConstructor;
-import org.springframework.web.bind.annotation.DeleteMapping;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.*;
 import server.poptato.global.response.BaseResponse;
+import server.poptato.user.api.request.UserChangeNameRequestDto;
 import server.poptato.user.application.service.UserService;
 import server.poptato.user.resolver.UserId;
 
@@ -20,6 +20,11 @@ public class UserController {
     @DeleteMapping
     public BaseResponse deleteUser(@UserId Long userId) {
         userService.deleteUser(userId);
-        return new BaseResponse(SUCCESS);
+        return new BaseResponse();
+    }
+    @PatchMapping("/mypage")
+    public BaseResponse updateUserName(@UserId Long userId, @Validated @RequestBody UserChangeNameRequestDto request) {
+        userService.updateUserName(userId, request.getNewName());
+        return new BaseResponse();
     }
 }
\ No newline at end of file
diff --git a/src/main/java/server/poptato/user/api/request/UserChangeNameRequestDto.java b/src/main/java/server/poptato/user/api/request/UserChangeNameRequestDto.java
new file mode 100644
index 0000000..442f590
--- /dev/null
+++ b/src/main/java/server/poptato/user/api/request/UserChangeNameRequestDto.java
@@ -0,0 +1,16 @@
+package server.poptato.user.api.request;
+
+import jakarta.validation.constraints.NotBlank;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Builder
+@Getter
+@AllArgsConstructor
+@NoArgsConstructor
+public class UserChangeNameRequestDto {
+    @NotBlank(message = "이름은 빈 값일 수 없습니다.")
+    String newName;
+}
diff --git a/src/main/java/server/poptato/user/application/service/UserService.java b/src/main/java/server/poptato/user/application/service/UserService.java
index 37f71e3..ea87864 100644
--- a/src/main/java/server/poptato/user/application/service/UserService.java
+++ b/src/main/java/server/poptato/user/application/service/UserService.java
@@ -40,4 +40,13 @@ public Optional<User> findUserByKakaoId(String kakaoId) {
         entityManager.clear();  // 영속성 컨텍스트 초기화
         return userRepository.findByKakaoId(kakaoId);
     }
+    @Transactional
+    public void updateUserName(Long userId, String newName) {
+        // 사용자 조회
+        User user = userRepository.findById(userId)
+                .orElseThrow(() -> new UserException(UserExceptionErrorCode.USER_NOT_EXIST));
+
+        // name 업데이트
+        user.changeName(newName);
+    }
 }
diff --git a/src/main/java/server/poptato/user/domain/entity/User.java b/src/main/java/server/poptato/user/domain/entity/User.java
index 4a4d0b2..1d1eaaf 100644
--- a/src/main/java/server/poptato/user/domain/entity/User.java
+++ b/src/main/java/server/poptato/user/domain/entity/User.java
@@ -38,4 +38,8 @@ public class User {
     @LastModifiedDate  // 엔티티가 수정될 때 시간 자동 저장
     private LocalDateTime modifyDate;
 
+    // name 변경 메서드
+    public void changeName(String newName) {
+        this.name = newName;
+    }
 }
diff --git a/src/main/java/server/poptato/user/resolver/UserResolver.java b/src/main/java/server/poptato/user/resolver/UserResolver.java
index f4907be..5ac874f 100644
--- a/src/main/java/server/poptato/user/resolver/UserResolver.java
+++ b/src/main/java/server/poptato/user/resolver/UserResolver.java
@@ -10,10 +10,12 @@
 import org.springframework.web.method.support.HandlerMethodArgumentResolver;
 import org.springframework.web.method.support.ModelAndViewContainer;
 import server.poptato.auth.application.service.JwtService;
+import server.poptato.auth.exception.AuthException;
 import server.poptato.global.exception.BaseException;
 import server.poptato.global.response.BaseErrorResponse;
 import server.poptato.user.resolver.UserId;
 
+import static server.poptato.auth.exception.errorcode.AuthExceptionErrorCode.*;
 import static server.poptato.global.exception.errorcode.BaseExceptionErrorCode.*;
 
 
@@ -32,17 +34,17 @@ public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer m
         final HttpServletRequest request = (HttpServletRequest) webRequest.getNativeRequest();
         final String token = request.getHeader("Authorization");
         if (token == null || token.isBlank() || !token.startsWith("Bearer ")) {
-            throw new BaseException(TOKEN_NOT_CONTAINED_EXCEPTION);
+            throw new AuthException(TOKEN_NOT_EXIST);
         }
         final String encodedUserId = token.substring("Bearer ".length());
         if (!jwtService.verifyToken(encodedUserId)) {
-            throw new BaseException(TOKEN_TIME_EXPIRED_EXCEPTION);
+            throw new AuthException(TOKEN_TIME_EXPIRED);
         }
         final String decodedUserId = jwtService.getUserIdInToken(encodedUserId);
         try {
             return Long.parseLong(decodedUserId);
         } catch (NumberFormatException e) {
-            return new BaseErrorResponse(INVALID_TOKEN_EXCEPTION);
+            return new AuthException(INVALID_TOKEN);
         }
     }
 }
diff --git a/src/test/java/server/poptato/user/api/UserControllerTest.java b/src/test/java/server/poptato/user/api/UserControllerTest.java
index 3bcea5e..357cddb 100644
--- a/src/test/java/server/poptato/user/api/UserControllerTest.java
+++ b/src/test/java/server/poptato/user/api/UserControllerTest.java
@@ -1,5 +1,7 @@
 package server.poptato.user.api;
 
+import com.fasterxml.jackson.databind.ObjectMapper;
+import jakarta.validation.Validator;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.DisplayName;
@@ -9,16 +11,17 @@
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.mock.mockito.MockBean;
 import org.springframework.data.redis.core.RedisTemplate;
+import org.springframework.http.MediaType;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
 import server.poptato.auth.application.service.JwtService;
-import server.poptato.todo.infra.repository.JpaTodoRepository;
+import server.poptato.todo.application.TodoService;
+import server.poptato.user.api.request.UserChangeNameRequestDto;
 import server.poptato.user.application.service.UserService;
-import server.poptato.user.infra.repository.JpaUserRepository;
 
 import static org.mockito.ArgumentMatchers.anyString;
-import static org.mockito.Mockito.doNothing;
-import static org.mockito.Mockito.when;
+import static org.mockito.Mockito.*;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.patch;
 import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
 
@@ -28,44 +31,63 @@ class UserControllerTest {
 
     @Autowired
     private MockMvc mockMvc;
-
     @MockBean
-    private JwtService jwtService;
-
+    private TodoService todoService;
     @MockBean
     private UserService userService;
-
-    @MockBean
-    private JpaUserRepository userRepository;
-
-    @MockBean
-    private JpaTodoRepository todoRepository;
-
+    @Autowired
+    private JwtService jwtService;
     @MockBean
     private RedisTemplate<String, String> redisTemplate;
-
+    private Validator validator;
     private String accessToken;
-    private final Long userId = 1L;
+    private final String userId = "1";
+    private ObjectMapper objectMapper;
 
     @BeforeEach
-    void createAccessToken() {
-        accessToken = jwtService.createAccessToken(userId.toString());
+    void userId가_1인_액세스토큰_생성() {
+        accessToken = jwtService.createAccessToken(userId);
     }
 
     @AfterEach
-    void deleteRefreshToken() {
-        jwtService.deleteRefreshToken(userId.toString());
+    void 액세스토큰_비활성화() {
+        jwtService.deleteRefreshToken(userId);
+    }
+    @Test
+    @DisplayName("사용자 이름 변경 성공 테스트")
+    void updateUserName_ShouldReturnSuccess() throws Exception {
+
+        // when & then
+        mockMvc.perform(patch("/user/mypage")
+                        .header("Authorization", "Bearer " + accessToken)  // JWT 토큰을 전달하는 부분
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"newName\": \"NewName\"}"))  // content를 "NewName"으로 수정
+                .andExpect(status().isOk());
+
+        // userService의 updateUserName이 올바르게 호출되는지 확인
+        verify(userService, times(1)).updateUserName(anyLong(), eq("NewName"));  // "NewName"과 일치하도록 수정
     }
 
+    @Test
+    @DisplayName("사용자 이름 변경 실패 - 이름이 빈 값일 때")
+    void updateUserName_ShouldReturnBadRequest_WhenNameIsEmpty() throws Exception {
+        // given
+        Long userId = 1L;
+        UserChangeNameRequestDto requestDto = new UserChangeNameRequestDto("");  // 빈 이름
+
+        // when & then
+        mockMvc.perform(patch("/user/mypage")
+                        .header("Authorization", "Bearer "+accessToken)
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"newName\": \"\"}"))
+                .andExpect(status().isBadRequest());
+
+        // userService가 호출되지 않는지 확인
+        verify(userService, times(0)).updateUserName(anyLong(), anyString());
+    }
     @Test
     @DisplayName("회원 탈퇴 성공 - 토큰 검증 후 응답 확인")
     void deleteUserSuccess() throws Exception {
-        // 토큰 검증 성공
-        when(jwtService.verifyToken(anyString())).thenReturn(true);
-        when(jwtService.getUserIdInToken(anyString())).thenReturn(userId.toString());
-
-        // UserService의 deleteUser()가 호출되는지 확인
-        doNothing().when(userService).deleteUser(userId);
 
         mockMvc.perform(MockMvcRequestBuilders.delete("/user")
                         .header("Authorization", "Bearer " + accessToken))
@@ -86,9 +108,6 @@ void deleteUserFailureNoToken() throws Exception {
     void deleteUserFailureInvalidToken() throws Exception {
         String invalidToken = "invalidToken";
 
-        // 토큰 검증 실패
-        when(jwtService.verifyToken(anyString())).thenReturn(false);
-
         mockMvc.perform(MockMvcRequestBuilders.delete("/user")
                         .header("Authorization", "Bearer " + invalidToken))
                 .andExpect(status().isBadRequest())
diff --git a/src/test/java/server/poptato/user/application/UserServiceTest.java b/src/test/java/server/poptato/user/application/UserServiceTest.java
new file mode 100644
index 0000000..6534b40
--- /dev/null
+++ b/src/test/java/server/poptato/user/application/UserServiceTest.java
@@ -0,0 +1,58 @@
+package server.poptato.user.application;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.transaction.annotation.Transactional;
+import server.poptato.user.application.service.UserService;
+import server.poptato.user.domain.entity.User;
+import server.poptato.user.domain.repository.UserRepository;
+import server.poptato.user.exception.UserException;
+import server.poptato.user.exception.errorcode.UserExceptionErrorCode;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+@SpringBootTest
+class UserServiceTest {
+
+    @Autowired
+    private UserService userService;
+
+    @Autowired
+    private UserRepository userRepository;
+
+    @Test
+    @DisplayName("사용자 이름 변경 성공 테스트")
+    @Transactional
+    void updateUserName_ShouldChangeUserName() {
+        // given
+        Long userId = 1L;
+        String newName = "New Name";
+
+        // when
+        userService.updateUserName(userId, newName);
+
+        // then
+        User updatedUser = userRepository.findById(userId).orElseThrow();
+        assertThat(updatedUser.getName()).isEqualTo(newName);
+    }
+
+    @Test
+    @DisplayName("존재하지 않는 사용자일 경우 예외 발생 테스트")
+    @Transactional
+    void updateUserName_ShouldThrowException_WhenUserNotFound() {
+        // given
+        Long nonExistentUserId = 999L;  // 존재하지 않는 유저 ID
+        String newName = "New Name";
+
+        // when & then
+        UserException exception = assertThrows(UserException.class, () -> {
+            userService.updateUserName(nonExistentUserId, newName);
+        });
+
+        assertThat(exception.getMessage()).isEqualTo(UserExceptionErrorCode.USER_NOT_EXIST.getMessage());
+    }
+}
+