diff --git a/src/main/java/com/halil/halil/domain/user/advice/UserControllerAdvice.java b/src/main/java/com/halil/halil/domain/user/advice/UserControllerAdvice.java
new file mode 100644
index 0000000..c7a2e2a
--- /dev/null
+++ b/src/main/java/com/halil/halil/domain/user/advice/UserControllerAdvice.java
@@ -0,0 +1,22 @@
+package com.halil.halil.domain.user.advice;
+
+import com.halil.halil.global.response.CommonResponse;
+import org.springframework.dao.DataIntegrityViolationException;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+@RestControllerAdvice
+public class UserControllerAdvice {
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    public ResponseEntity<CommonResponse> invalidDtoException(MethodArgumentNotValidException e){
+        return new ResponseEntity<>(CommonResponse.createError("take a form plz"), HttpStatus.BAD_REQUEST);
+    }
+    @ExceptionHandler(DataIntegrityViolationException.class)
+    public ResponseEntity<CommonResponse> ExistUserNickNameException(DataIntegrityViolationException e){
+        return new ResponseEntity<>(CommonResponse.createError("Already Exist NickName"), HttpStatus.BAD_REQUEST);
+    }
+
+}
diff --git a/src/main/java/com/halil/halil/domain/user/controller/UserController.java b/src/main/java/com/halil/halil/domain/user/controller/UserController.java
index ccdd582..1a29457 100644
--- a/src/main/java/com/halil/halil/domain/user/controller/UserController.java
+++ b/src/main/java/com/halil/halil/domain/user/controller/UserController.java
@@ -7,9 +7,9 @@
 import com.halil.halil.domain.user.service.UserService;
 import com.halil.halil.global.response.CommonResponse;
 import lombok.RequiredArgsConstructor;
-import org.springframework.dao.DataIntegrityViolationException;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
+import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.MethodArgumentNotValidException;
 import org.springframework.web.bind.annotation.*;
 import javax.servlet.http.HttpServletRequest;
@@ -31,16 +31,8 @@ public ResponseEntity<?> updateUserInfo(HttpServletRequest request, @RequestBody
     }
 
     @PostMapping("/create")
-    ResponseEntity<CommonResponse> CreateUser(@RequestBody @Valid UserCreateRequestDto userCreateRequestDto){
-        UserCreateResponseDto userCreateResponseDto = userService.CreateUser(userCreateRequestDto);
+    ResponseEntity<CommonResponse> createUser(@RequestBody @Valid UserCreateRequestDto userCreateRequestDto){
+        UserCreateResponseDto userCreateResponseDto = userService.createUser(userCreateRequestDto);
         return new ResponseEntity<>(CommonResponse.createSuccess(userCreateResponseDto), HttpStatus.OK);
     }
-    @ExceptionHandler(MethodArgumentNotValidException.class)
-    public String invalidUserException(MethodArgumentNotValidException e){
-        return "take a form";
-    }
-    @ExceptionHandler(DataIntegrityViolationException.class)
-    public String nullTypeUserException(DataIntegrityViolationException e){
-        return "Already Exist User";
-    }
 }
\ No newline at end of file
diff --git a/src/main/java/com/halil/halil/domain/user/dto/UserCreateRequestDto.java b/src/main/java/com/halil/halil/domain/user/dto/UserCreateRequestDto.java
index a1a9d23..e5b54c1 100644
--- a/src/main/java/com/halil/halil/domain/user/dto/UserCreateRequestDto.java
+++ b/src/main/java/com/halil/halil/domain/user/dto/UserCreateRequestDto.java
@@ -1,8 +1,10 @@
 package com.halil.halil.domain.user.dto;
 
+import com.halil.halil.domain.user.entity.User;
 import lombok.*;
 
 import javax.validation.constraints.Email;
+import javax.validation.constraints.NotBlank;
 import javax.validation.constraints.NotNull;
 
 @Getter
@@ -10,9 +12,16 @@
 @AllArgsConstructor
 @Builder
 public class UserCreateRequestDto {
-    @NotNull
+    @NotBlank
     @Email
     String email;
-    @NotNull
+    @NotBlank
     String nickName;
+
+    public User toEntity(){
+        return User.builder()
+                .email(email)
+                .nickname(nickName)
+                .build();
+    }
 }
diff --git a/src/main/java/com/halil/halil/domain/user/dto/UserResponseDto.java b/src/main/java/com/halil/halil/domain/user/dto/UserResponseDto.java
index 8a02928..35a6648 100644
--- a/src/main/java/com/halil/halil/domain/user/dto/UserResponseDto.java
+++ b/src/main/java/com/halil/halil/domain/user/dto/UserResponseDto.java
@@ -9,10 +9,10 @@
 public class UserResponseDto {
 
     private String email;
-    private String nickname;
+    private String nickName;
 
     public UserResponseDto(User user){
         this.email = user.getEmail();
-        this.nickname = user.getNickname();
+        this.nickName = user.getNickName();
     }
 }
diff --git a/src/main/java/com/halil/halil/domain/user/dto/UserUpdateRequestDto.java b/src/main/java/com/halil/halil/domain/user/dto/UserUpdateRequestDto.java
index f5badfa..9704691 100644
--- a/src/main/java/com/halil/halil/domain/user/dto/UserUpdateRequestDto.java
+++ b/src/main/java/com/halil/halil/domain/user/dto/UserUpdateRequestDto.java
@@ -16,6 +16,6 @@ public class UserUpdateRequestDto {
     private String email;
 
     @NotBlank(message = "닉네임은 필수 입력값입니다.")
-    private String nickname;
+    private String nickName;
 
 }
diff --git a/src/main/java/com/halil/halil/domain/user/entity/User.java b/src/main/java/com/halil/halil/domain/user/entity/User.java
index 8b67c91..3161f22 100644
--- a/src/main/java/com/halil/halil/domain/user/entity/User.java
+++ b/src/main/java/com/halil/halil/domain/user/entity/User.java
@@ -4,9 +4,11 @@
 import lombok.*;
 
 import javax.persistence.*;
+import javax.validation.constraints.NotBlank;
 
 @Entity
 @Getter
+@Table(name = "USERS")
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 public class User {
     @Id
@@ -15,7 +17,7 @@ public class User {
     private Long user_id;
 
     @Column(name = "NICKNAME", unique = true, nullable = false)
-    private String nickname;
+    private String nickName;
 
     @Column(name = "EMAIL", unique = true, nullable = false)
     private String email;
@@ -25,12 +27,12 @@ public class User {
 
     @Builder
     public User( String nickname, String email){
-        this.nickname = nickname;
+        this.nickName = nickname;
         this.email = email;
     }
 
-    public void update(String nickname){
-        this.nickname = nickname;
+    public void update(String nickName){
+        this.nickName = nickName;
     }
 
     public void updateRefreshToken(String refreshToken){
diff --git a/src/main/java/com/halil/halil/domain/user/exception/ExistUserException.java b/src/main/java/com/halil/halil/domain/user/exception/ExistUserException.java
index 331e159..1dd2802 100644
--- a/src/main/java/com/halil/halil/domain/user/exception/ExistUserException.java
+++ b/src/main/java/com/halil/halil/domain/user/exception/ExistUserException.java
@@ -1,7 +1,9 @@
 package com.halil.halil.domain.user.exception;
 
-public class ExistUserException extends RuntimeException{
-    public ExistUserException(String message){
-        super(message);
+import org.springframework.dao.DataIntegrityViolationException;
+
+public class ExistUserException extends DataIntegrityViolationException {
+    public ExistUserException(){
+        super("Already Exist User!");
     }
 }
\ No newline at end of file
diff --git a/src/main/java/com/halil/halil/domain/user/repository/UserRepository.java b/src/main/java/com/halil/halil/domain/user/repository/UserRepository.java
index a4237e6..c5f9c23 100644
--- a/src/main/java/com/halil/halil/domain/user/repository/UserRepository.java
+++ b/src/main/java/com/halil/halil/domain/user/repository/UserRepository.java
@@ -8,4 +8,5 @@
 public interface UserRepository extends JpaRepository<User, Long> {
     Optional<User> findUserByEmail(String email);
     Optional<User> findUserByNickName(String nickName);
+    Optional<User> findByEmail(String email);
 }
diff --git a/src/main/java/com/halil/halil/domain/user/service/UserCreateServiceImpl.java b/src/main/java/com/halil/halil/domain/user/service/UserCreateServiceImpl.java
deleted file mode 100644
index 5c835cb..0000000
--- a/src/main/java/com/halil/halil/domain/user/service/UserCreateServiceImpl.java
+++ /dev/null
@@ -1,27 +0,0 @@
-package com.halil.halil.domain.user.service;
-
-import com.halil.halil.domain.user.dto.UserCreateRequestDto;
-import com.halil.halil.domain.user.dto.UserCreateResponseDto;
-import com.halil.halil.domain.user.entity.User;
-import com.halil.halil.domain.user.repository.UserRepository;
-import com.halil.halil.global.util.jwt.JwtProvider;
-import lombok.RequiredArgsConstructor;
-import org.springframework.context.annotation.Primary;
-import org.springframework.stereotype.Service;
-
-
-@Service
-@Primary
-@RequiredArgsConstructor
-public class UserCreateServiceImpl implements UserService{
-    private final UserRepository userRepository;
-    private final JwtProvider jwtProvider;
-    @Override
-    public UserCreateResponseDto CreateUser(UserCreateRequestDto userCreateRequestDto){
-        User user = new User().builder().email(userCreateRequestDto.getEmail()).nickName(userCreateRequestDto.getNickName()).build();
-        userRepository.save(user);
-        String accessToken = jwtProvider.createAccessToken(userCreateRequestDto.getNickName(), userCreateRequestDto.getEmail());
-        String refreshToken = jwtProvider.createRefreshToken(userCreateRequestDto.getNickName(), userCreateRequestDto.getEmail());
-        return new UserCreateResponseDto(accessToken,refreshToken);
-    }
-}
diff --git a/src/main/java/com/halil/halil/domain/user/service/UserService.java b/src/main/java/com/halil/halil/domain/user/service/UserService.java
index 96a20a5..9eb683a 100644
--- a/src/main/java/com/halil/halil/domain/user/service/UserService.java
+++ b/src/main/java/com/halil/halil/domain/user/service/UserService.java
@@ -11,5 +11,5 @@
 public interface UserService {
     UserResponseDto updateUserInfo(String email, UserUpdateRequestDto userUpdateRequestDto);
     void updateRefreshToken(String email, String refreshToken);
-    UserCreateResponseDto CreateUser(UserCreateRequestDto userCreateRequestDto);
+    UserCreateResponseDto createUser(UserCreateRequestDto userCreateRequestDto);
 }
\ No newline at end of file
diff --git a/src/main/java/com/halil/halil/domain/user/service/UserServiceImpl.java b/src/main/java/com/halil/halil/domain/user/service/UserServiceImpl.java
index 82008ec..e5fe7c2 100644
--- a/src/main/java/com/halil/halil/domain/user/service/UserServiceImpl.java
+++ b/src/main/java/com/halil/halil/domain/user/service/UserServiceImpl.java
@@ -1,34 +1,31 @@
 package com.halil.halil.domain.user.service;
 
+import com.halil.halil.domain.user.dto.UserCreateRequestDto;
+import com.halil.halil.domain.user.dto.UserCreateResponseDto;
 import com.halil.halil.domain.user.dto.UserResponseDto;
 import com.halil.halil.domain.user.dto.UserUpdateRequestDto;
 import com.halil.halil.domain.user.entity.User;
+import com.halil.halil.domain.user.exception.ExistUserException;
 import com.halil.halil.domain.user.repository.UserRepository;
 import com.halil.halil.global.exception.ExistNicknameException;
 import com.halil.halil.global.exception.NoExistUserException;
+import com.halil.halil.global.util.jwt.JwtProvider;
 import lombok.RequiredArgsConstructor;
 import org.springframework.dao.DataIntegrityViolationException;
 import org.springframework.stereotype.Service;
 
-import java.util.NoSuchElementException;
-import java.util.Optional;
-
 @Service
 @RequiredArgsConstructor
 public class UserServiceImpl implements UserService{
     private final UserRepository userRepository;
-
+    private final JwtProvider jwtProvider;
     @Override
     public UserResponseDto updateUserInfo(String email, UserUpdateRequestDto userUpdateRequestDto) {
         User user = userRepository.findByEmail(email).orElseThrow(() -> new NoExistUserException("존재하는 회원정보가 없습니다."));
-        try{
-            user.update(userUpdateRequestDto.getNickname());
-            userRepository.save(user);
-            UserResponseDto userResponseDto = new UserResponseDto(user);
-            return userResponseDto;
-        }catch (DataIntegrityViolationException e){
-            throw new ExistNicknameException("존재하는 닉네임입니다.");
-        }
+        user.update(userUpdateRequestDto.getNickName());
+        userRepository.save(user);
+        UserResponseDto userResponseDto = new UserResponseDto(user);
+        return userResponseDto;
     }
 
     @Override
@@ -37,6 +34,15 @@ public void updateRefreshToken(String email, String refreshToken) {
         user.updateRefreshToken(refreshToken);
         userRepository.save(user);
     }
-
-
+    @Override
+    public UserCreateResponseDto createUser(UserCreateRequestDto userCreateRequestDto){
+        try {
+            userRepository.save(userCreateRequestDto.toEntity());
+            String accessToken = jwtProvider.createAccessToken(userCreateRequestDto.getNickName(), userCreateRequestDto.getEmail());
+            String refreshToken = jwtProvider.createRefreshToken(userCreateRequestDto.getNickName(), userCreateRequestDto.getEmail());
+            return new UserCreateResponseDto(accessToken, refreshToken);
+        }catch (ExistUserException e){
+            throw new ExistUserException();
+        }
+    }
 }
diff --git a/src/main/java/com/halil/halil/global/cofing/WebMvcConfiguration.java b/src/main/java/com/halil/halil/global/cofing/WebMvcConfiguration.java
index f114e61..fba3a4d 100644
--- a/src/main/java/com/halil/halil/global/cofing/WebMvcConfiguration.java
+++ b/src/main/java/com/halil/halil/global/cofing/WebMvcConfiguration.java
@@ -1,6 +1,6 @@
 package com.halil.halil.global.cofing;
 
-import com.halil.halil.global.util.JwtInterceptor;
+import com.halil.halil.global.util.jwt.JwtInterceptor;
 import lombok.RequiredArgsConstructor;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
diff --git a/src/main/java/com/halil/halil/global/util/JwtInterceptor.java b/src/main/java/com/halil/halil/global/util/jwt/JwtInterceptor.java
similarity index 98%
rename from src/main/java/com/halil/halil/global/util/JwtInterceptor.java
rename to src/main/java/com/halil/halil/global/util/jwt/JwtInterceptor.java
index 1ff4439..c07d21d 100644
--- a/src/main/java/com/halil/halil/global/util/JwtInterceptor.java
+++ b/src/main/java/com/halil/halil/global/util/jwt/JwtInterceptor.java
@@ -1,4 +1,4 @@
-package com.halil.halil.global.util;
+package com.halil.halil.global.util.jwt;
 
 import com.halil.halil.domain.user.service.UserService;
 import io.jsonwebtoken.ExpiredJwtException;
diff --git a/src/main/java/com/halil/halil/global/util/jwt/JwtProvider.java b/src/main/java/com/halil/halil/global/util/jwt/JwtProvider.java
index d233c31..919b190 100644
--- a/src/main/java/com/halil/halil/global/util/jwt/JwtProvider.java
+++ b/src/main/java/com/halil/halil/global/util/jwt/JwtProvider.java
@@ -13,15 +13,15 @@ public class JwtProvider {
 
     @Value("${jwt.secret}")
     private String SECRET_KEY;
-
+    private Long accessTokenExpired = 1000L * 60;
+    private Long refreshTokenExpired = 1000L * 60 * 60 * 24;
     public String createAccessToken(String nickName, String email) {
         Long tokenInvalidTime = 1000L * 60 * 3; // 3m
         return this.createToken(email, nickName, tokenInvalidTime);
     }
 
     public String createRefreshToken(String nickName, String email) {
-        Long tokenInvalidTime = 1000L * 60 * 60 * 24; // 1d
-        String refreshToken = this.createToken(nickName, email, tokenInvalidTime);
+        String refreshToken = this.createToken(nickName, email, refreshTokenExpired);
         return refreshToken;
     }
 
@@ -31,7 +31,7 @@ private String createToken(String nickName, String email, Long tokenInvalidTime)
                 .claim("nickName",nickName)
                 .claim("email",email)
                 .setIssuedAt(date)
-                .setExpiration(new Date(date.getTime() + tokenInvalidTime))
+                .setExpiration(new Date(date.getTime() + accessTokenExpired))
                 .signWith(SignatureAlgorithm.HS256, SECRET_KEY)
                 .compact();
     }
diff --git a/src/main/java/com/halil/halil/global/util/JwtService.java b/src/main/java/com/halil/halil/global/util/jwt/JwtService.java
similarity index 90%
rename from src/main/java/com/halil/halil/global/util/JwtService.java
rename to src/main/java/com/halil/halil/global/util/jwt/JwtService.java
index 7c9673d..bddfda0 100644
--- a/src/main/java/com/halil/halil/global/util/JwtService.java
+++ b/src/main/java/com/halil/halil/global/util/jwt/JwtService.java
@@ -1,4 +1,4 @@
-package com.halil.halil.global.util;
+package com.halil.halil.global.util.jwt;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
 
diff --git a/src/main/java/com/halil/halil/global/util/JwtServiceImpl.java b/src/main/java/com/halil/halil/global/util/jwt/JwtServiceImpl.java
similarity index 98%
rename from src/main/java/com/halil/halil/global/util/JwtServiceImpl.java
rename to src/main/java/com/halil/halil/global/util/jwt/JwtServiceImpl.java
index eac4bdd..7a9e043 100644
--- a/src/main/java/com/halil/halil/global/util/JwtServiceImpl.java
+++ b/src/main/java/com/halil/halil/global/util/jwt/JwtServiceImpl.java
@@ -1,4 +1,4 @@
-package com.halil.halil.global.util;
+package com.halil.halil.global.util.jwt;
 
 import com.halil.halil.domain.user.entity.User;
 import com.halil.halil.domain.user.repository.UserRepository;
diff --git a/src/test/java/com/halil/halil/domain/user/UserServiceTest.java b/src/test/java/com/halil/halil/domain/user/UserServiceTest.java
index 75231d3..8f45530 100644
--- a/src/test/java/com/halil/halil/domain/user/UserServiceTest.java
+++ b/src/test/java/com/halil/halil/domain/user/UserServiceTest.java
@@ -1,28 +1,19 @@
 package com.halil.halil.domain.user;
 
 import com.halil.halil.domain.user.dto.UserCreateRequestDto;
-import com.halil.halil.domain.user.entity.User;
-import com.halil.halil.domain.user.exception.ExistUserException;
 import com.halil.halil.domain.user.repository.UserRepository;
-import com.halil.halil.domain.user.service.UserCreateServiceImpl;
-import com.halil.halil.domain.user.service.UserService;
+import com.halil.halil.domain.user.service.UserServiceImpl;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.DisplayName;
-import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
 import org.junit.jupiter.api.Test;
-import org.mockito.InjectMocks;
-import org.mockito.Mock;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.dao.DataIntegrityViolationException;
 
-import static org.junit.jupiter.api.Assertions.*;
-import java.util.Optional;
-
 @SpringBootTest
 class UserServiceTest {
     @Autowired
-    private UserCreateServiceImpl userCreateServiceImpl;
+    private UserServiceImpl userCreateServiceImpl;
     @Autowired
     private UserRepository userRepository;
 
@@ -36,13 +27,13 @@ void Setup(){
     @DisplayName("Already Exist User Exception Test")
     void AlreadyExistUserTest(){
         UserCreateRequestDto dupUserCreateRequestDto = new UserCreateRequestDto("email1","nickname1");
-        userCreateServiceImpl.CreateUser(userCreateRequestDto1);
-        Assertions.assertThrows(DataIntegrityViolationException.class, () -> userCreateServiceImpl.CreateUser(dupUserCreateRequestDto));
+        userCreateServiceImpl.createUser(userCreateRequestDto1);
+        Assertions.assertThrows(DataIntegrityViolationException.class, () -> userCreateServiceImpl.createUser(dupUserCreateRequestDto));
     }
     @Test
     @DisplayName("No nickName in User Test")
     void NotExistUserNameTest(){
         UserCreateRequestDto userCreateRequestDto = new UserCreateRequestDto("nickname",null);
-        Assertions.assertThrows(DataIntegrityViolationException.class, () -> userCreateServiceImpl.CreateUser(userCreateRequestDto));
+        Assertions.assertThrows(DataIntegrityViolationException.class, () -> userCreateServiceImpl.createUser(userCreateRequestDto));
     }
 }
\ No newline at end of file