diff --git a/src/main/java/demo/api/auth/AuthController.java b/src/main/java/demo/api/auth/AuthController.java
new file mode 100644
index 0000000..6e4faaa
--- /dev/null
+++ b/src/main/java/demo/api/auth/AuthController.java
@@ -0,0 +1,49 @@
+package demo.api.auth;
+
+import demo.api.jwt.dtos.TokenDto;
+import demo.api.user.domain.User;
+import demo.api.user.dtos.UserSignInRequest;
+import demo.api.user.dtos.UserSignUpRequest;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+
+@Controller
+@RequestMapping("/auth")
+@RequiredArgsConstructor
+public class AuthController {
+  private final AuthService authService;
+
+  @GetMapping("/signUp")
+  public String signUp() {
+    return "user/signUp";
+  }
+
+  @PostMapping("/signUp")
+  public String signUp(@Validated UserSignUpRequest signUpReq) throws Exception {
+    User user = authService.signUp(signUpReq);
+
+    if(user.getEmail() != "") {
+      return "redirect:/user/signIn";
+    }
+
+    return "redirect:/user/signUp";
+  }
+
+  @GetMapping("/signIn")
+  public String signIn(@RequestParam(value = "fail", required = false) String flag, Model model) {
+    model.addAttribute("failed", flag != null);
+
+    return "user/signIn";
+  }
+
+  @PostMapping
+  public TokenDto signIn(@Validated UserSignInRequest signInReq) {
+    return authService.signIn(signInReq);
+  }
+}
diff --git a/src/main/java/demo/api/auth/AuthService.java b/src/main/java/demo/api/auth/AuthService.java
new file mode 100644
index 0000000..ab6382d
--- /dev/null
+++ b/src/main/java/demo/api/auth/AuthService.java
@@ -0,0 +1,22 @@
+package demo.api.auth;
+
+import demo.api.jwt.dtos.TokenDto;
+import demo.api.user.domain.User;
+import demo.api.user.dtos.UserSignInRequest;
+import demo.api.user.dtos.UserSignUpRequest;
+
+public interface AuthService {
+  /**
+   * 유저의 정보로 회원가입
+   * @param signUpReq 가입할 유저의 정보 Dto
+   * @return 가입된 유저 정보
+   */
+  User signUp(UserSignUpRequest signUpReq) throws Exception;
+
+  /**
+   * 유저 정보로 로그인
+   * @param signInReq 유저의 이메일과 비밀번호
+   * @return json web token
+   */
+  TokenDto signIn(UserSignInRequest signInReq);
+}
diff --git a/src/main/java/demo/api/auth/AuthServiceImpl.java b/src/main/java/demo/api/auth/AuthServiceImpl.java
new file mode 100644
index 0000000..5b8e592
--- /dev/null
+++ b/src/main/java/demo/api/auth/AuthServiceImpl.java
@@ -0,0 +1,67 @@
+package demo.api.auth;
+
+import demo.api.exception.CustomException;
+import demo.api.jwt.JwtTokenProvider;
+import demo.api.jwt.dtos.TokenDto;
+import demo.api.user.domain.User;
+import demo.api.user.dtos.UserSignInRequest;
+import demo.api.user.dtos.UserSignUpRequest;
+import demo.api.user.repository.UserRepository;
+import java.util.Optional;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpStatus;
+import org.springframework.security.authentication.AuthenticationManager;
+import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.AuthenticationException;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@RequiredArgsConstructor
+public class AuthServiceImpl implements AuthService {
+  private final UserRepository userRepository;
+  private final PasswordEncoder bCryptPasswordEncoder;
+  private final JwtTokenProvider jwtTokenProvider;
+  private final AuthenticationManager authenticationManager;
+
+  @Override
+  @Transactional
+  public User signUp(UserSignUpRequest signUpReq) throws Exception {
+    System.out.println("signUpReq = " + signUpReq.toString());
+    if(this.isEmailExist(signUpReq.getEmail())) {
+      throw new Exception("Your Mail already Exist.");
+    }
+    User newUser = signUpReq.toUserEntity();
+    newUser.hashPassword(bCryptPasswordEncoder);
+    return userRepository.save(newUser);
+  }
+
+  @Override
+  public TokenDto signIn(UserSignInRequest signInReq) {
+    try {
+      Authentication authentication = authenticationManager.authenticate(
+          new UsernamePasswordAuthenticationToken(
+              signInReq.getEmail(),
+              signInReq.getPassword()
+          )
+      );
+
+      return new TokenDto(jwtTokenProvider.generateToken(authentication));
+    } catch (AuthenticationException e) {
+      throw new CustomException("Invalid credentials supplied", HttpStatus.UNPROCESSABLE_ENTITY);
+    }
+  }
+
+  /**
+   * 이메일 중복 여부를 확인
+   *
+   * @param email
+   * @return true | false
+   */
+  private boolean isEmailExist(String email) {
+    Optional<User> byEmail = userRepository.findByEmail(email);
+    return !byEmail.isEmpty();
+  }
+}
diff --git a/src/main/java/demo/api/config/SecurityConfig.java b/src/main/java/demo/api/config/SecurityConfig.java
index 5b01272..3300ad0 100644
--- a/src/main/java/demo/api/config/SecurityConfig.java
+++ b/src/main/java/demo/api/config/SecurityConfig.java
@@ -21,11 +21,7 @@ public class SecurityConfig {
   private final JwtTokenProvider jwtTokenProvider;
   private final JwtAccessDeniedHandler jwtAccessDeniedHandler;
   private final JwtAuthenticationEntryPoint jwtAuthenticationEntryPoint;
-  
-//  @Bean
-//  public UserDetailsService userDetailsService() {
-//    return new UserDetailsServiceImpl();
-//  }
+
   @Bean
   public BCryptPasswordEncoder passwordEncoder() {
     return new BCryptPasswordEncoder();
@@ -48,9 +44,9 @@ public class SecurityConfig {
         .authorizeRequests()
         .antMatchers(
             "/",
-            "/user/signUp",
+            "/auth/signUp",
             "/user/userList",
-            "/user/signIn*",
+            "/auth/signIn*",
             "/favicon.ico"
         ).permitAll()
         .anyRequest().authenticated();
diff --git a/src/main/java/demo/api/config/UserDetailsServiceImpl.java b/src/main/java/demo/api/config/UserDetailsServiceImpl.java
index 8ff2c30..f072735 100644
--- a/src/main/java/demo/api/config/UserDetailsServiceImpl.java
+++ b/src/main/java/demo/api/config/UserDetailsServiceImpl.java
@@ -15,7 +15,7 @@ import org.springframework.security.core.userdetails.UserDetailsService;
 import org.springframework.stereotype.Component;
 import org.springframework.stereotype.Service;
 
-@Component
+@Service
 public class UserDetailsServiceImpl implements UserDetailsService {
   @Autowired
   private UserRepository userRepository;
diff --git a/src/main/java/demo/api/jwt/dtos/TokenDto.java b/src/main/java/demo/api/jwt/dtos/TokenDto.java
new file mode 100644
index 0000000..0bfdd77
--- /dev/null
+++ b/src/main/java/demo/api/jwt/dtos/TokenDto.java
@@ -0,0 +1,8 @@
+package demo.api.jwt.dtos;
+
+import lombok.AllArgsConstructor;
+
+@AllArgsConstructor
+public class TokenDto {
+  private String access_token;
+}
diff --git a/src/main/java/demo/api/user/UserController.java b/src/main/java/demo/api/user/UserController.java
index 2037218..9eebc98 100644
--- a/src/main/java/demo/api/user/UserController.java
+++ b/src/main/java/demo/api/user/UserController.java
@@ -24,25 +24,6 @@ import org.springframework.web.bind.annotation.RequestParam;
 public class UserController {
   private final UserService userService;
 
-  @GetMapping("/signUp")
-  public String signUp() {
-    return "user/signUp";
-  }
-
-  @PostMapping("/signUp")
-  public String signUp(@Validated UserSignUpRequest signUpReq) throws Exception {
-    User user = userService.signUp(signUpReq);
-
-    return "redirect:/user/signIn";
-  }
-
-  @GetMapping("/signIn")
-  public String signIn(@RequestParam(value = "fail", required = false) String flag, Model model) {
-    model.addAttribute("failed", flag != null);
-
-    return "user/signIn";
-  }
-
   @GetMapping("/profile")
   public String profile(Model model, @AuthenticationPrincipal UserDetails userDetails) {
     if (userDetails != null) {
diff --git a/src/main/java/demo/api/user/UserService.java b/src/main/java/demo/api/user/UserService.java
index dfeee6d..1e42a4b 100644
--- a/src/main/java/demo/api/user/UserService.java
+++ b/src/main/java/demo/api/user/UserService.java
@@ -6,13 +6,6 @@ import java.util.List;
 import java.util.Optional;
 
 public interface UserService {
-  /**
-   * 유저의 정보로 회원가입
-   * @param signUpReq 가입할 유저의 정보 Dto
-   * @return 가입된 유저 정보
-   */
-  User signUp(UserSignUpRequest signUpReq) throws Exception;
-
   /**
    * 모든 유저 리스트를 반환
    * @return 유저 리스트
diff --git a/src/main/java/demo/api/user/UserServiceImpl.java b/src/main/java/demo/api/user/UserServiceImpl.java
index acb5ade..5998c7c 100644
--- a/src/main/java/demo/api/user/UserServiceImpl.java
+++ b/src/main/java/demo/api/user/UserServiceImpl.java
@@ -1,32 +1,16 @@
 package demo.api.user;
 
 import demo.api.user.domain.User;
-import demo.api.user.dtos.UserSignUpRequest;
 import demo.api.user.repository.UserRepository;
 import java.util.List;
 import java.util.Optional;
 import lombok.RequiredArgsConstructor;
-import org.springframework.security.crypto.password.PasswordEncoder;
 import org.springframework.stereotype.Service;
-import org.springframework.transaction.annotation.Transactional;
 
 @Service
 @RequiredArgsConstructor
-@Transactional
 public class UserServiceImpl implements UserService {
   private final UserRepository userRepository;
-  private final PasswordEncoder bCryptPasswordEncoder;
-
-  @Override
-  public User signUp(UserSignUpRequest signUpReq) throws Exception {
-    System.out.println("signUpReq = " + signUpReq.toString());
-    if(this.isEmailExist(signUpReq.getEmail())) {
-      throw new Exception("Your Mail already Exist.");
-    }
-    User newUser = signUpReq.toUserEntity();
-    newUser.hashPassword(bCryptPasswordEncoder);
-    return userRepository.save(newUser);
-  }
 
   @Override
   public List<User> findAll() {
@@ -42,15 +26,4 @@ public class UserServiceImpl implements UserService {
   public User updateUser(User user, String newInfo) {
     return null;
   }
-
-  /**
-   * 이메일 중복 여부를 확인
-   *
-   * @param email
-   * @return true | false
-   */
-  private boolean isEmailExist(String email) {
-    Optional<User> byEmail = userRepository.findByEmail(email);
-    return !byEmail.isEmpty();
-  }
 }
diff --git a/src/main/java/demo/api/user/dtos/UserSignInRequest.java b/src/main/java/demo/api/user/dtos/UserSignInRequest.java
new file mode 100644
index 0000000..c6cab39
--- /dev/null
+++ b/src/main/java/demo/api/user/dtos/UserSignInRequest.java
@@ -0,0 +1,26 @@
+package demo.api.user.dtos;
+
+import demo.api.user.domain.User;
+import javax.validation.constraints.Email;
+import javax.validation.constraints.NotEmpty;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.Setter;
+import lombok.ToString;
+
+@Getter
+@ToString
+public class UserSignInRequest {
+  @NotEmpty(message = "Please enter your Email")
+  @Email
+  private String email;
+  @NotEmpty(message = "Please enter your Password")
+  private String password;
+
+  @Builder
+  public UserSignInRequest(String email, String password) {
+    this.email = email;
+    this.password = password;
+  }
+}
+
diff --git a/src/main/java/demo/api/user/repository/UserRepository.java b/src/main/java/demo/api/user/repository/UserRepository.java
index 394d793..1c192a2 100644
--- a/src/main/java/demo/api/user/repository/UserRepository.java
+++ b/src/main/java/demo/api/user/repository/UserRepository.java
@@ -5,7 +5,7 @@ import java.util.Optional;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
-// @Repository
+@Repository
 public interface UserRepository extends JpaRepository<User, Long> {
 
   Optional<User> findByEmail(String email);
diff --git a/src/main/resources/templates/user/signIn.html b/src/main/resources/templates/user/signIn.html
index 1c6d9f9..844cda2 100644
--- a/src/main/resources/templates/user/signIn.html
+++ b/src/main/resources/templates/user/signIn.html
@@ -10,7 +10,7 @@
       <h2>로그인</h2>
     </div>
     <h3 th:if="${failed}">Fail to login</h3>
-    <form action="/user/signInProc" method="post">
+    <form action="/auth/signIn" method="post">
       <div class="form-group">
         <label for="email">Email</label>
         <input type="email" id="email" name="email" placeholder="Enter your email">
diff --git a/src/main/resources/templates/user/signUp.html b/src/main/resources/templates/user/signUp.html
index e24d719..9429d33 100644
--- a/src/main/resources/templates/user/signUp.html
+++ b/src/main/resources/templates/user/signUp.html
@@ -5,7 +5,7 @@
     <div>
       <h2>회원가입</h2>
     </div>
-    <form action="/user/signUp" method="post">
+    <form action="/auth/signUp" method="post">
       <div class="form-group">
         <label for="email">Email</label>
         <input type="text" id="email" name="email" placeholder="Enter your email">
diff --git a/src/test/java/demo/api/user/service/UserServiceTest.java b/src/test/java/demo/api/user/service/UserServiceTest.java
index da05f1c..92fae17 100644
--- a/src/test/java/demo/api/user/service/UserServiceTest.java
+++ b/src/test/java/demo/api/user/service/UserServiceTest.java
@@ -3,24 +3,17 @@ package demo.api.user.service;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.api.Assertions.*;
 
-import demo.api.AppConfig;
+import demo.api.auth.AuthService;
 import demo.api.user.UserService;
-import demo.api.user.UserServiceImpl;
 import demo.api.user.domain.User;
 import demo.api.user.dtos.UserSignUpRequest;
 import demo.api.user.repository.UserRepository;
 import java.util.List;
 import java.util.Optional;
-import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.DisplayName;
 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.security.core.Authentication;
-import org.springframework.security.core.context.SecurityContextHolder;
-import org.springframework.security.core.userdetails.UserDetailsService;
 import org.springframework.security.crypto.password.PasswordEncoder;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -31,17 +24,13 @@ class UserServiceTest {
   private static final String EMAIL = "test@email.com";
   private static final String PASSWORD = "12345";
   private static final String NAME = "김정호";
-  private UserService userService;
-  @Autowired
-  private UserRepository userRepository;
+
   @Autowired
   private PasswordEncoder bCryptPasswordEncoder;
-
-  @BeforeEach
-  public void beforeEach() {
-    AppConfig appConfig = new AppConfig(userRepository, bCryptPasswordEncoder);
-    userService = appConfig.userService();
-  }
+  @Autowired
+  private UserService userService;
+  @Autowired
+  private AuthService authService;
 
   @Test
   @DisplayName("유저 회원가입")
@@ -51,7 +40,7 @@ class UserServiceTest {
     System.out.println("user = " + user.toString());
 
     // when
-    User newUser = userService.signUp(user);
+    User newUser = authService.signUp(user);
 
     // then
     System.out.println("newUser = " + newUser.toString());
@@ -65,7 +54,7 @@ class UserServiceTest {
     UserSignUpRequest user = createSignUpRequest();
 
     // when
-    User newUser = userService.signUp(user);
+    User newUser = authService.signUp(user);
 
     // then
     System.out.println("newUser pw = " + newUser.getPassword());
@@ -78,10 +67,10 @@ class UserServiceTest {
     // given
     UserSignUpRequest user = createSignUpRequest();
     System.out.println("user = " + user.toString());
-    User newUser = userService.signUp(user);
+    User newUser = authService.signUp(user);
 
     // when
-    Boolean flag = newUser.checkPassword(PASSWORD, bCryptPasswordEncoder);
+    boolean flag = newUser.checkPassword(PASSWORD, bCryptPasswordEncoder);
     System.out.println("flag = " + flag);
 
     // then
@@ -94,7 +83,7 @@ class UserServiceTest {
     List<User> prevUserList = userService.findAll();
     int prevLen = prevUserList.size();
     UserSignUpRequest user1 = createSignUpRequest();
-    userService.signUp(user1);
+    authService.signUp(user1);
 
     // when
     List<User> userList = userService.findAll();
@@ -108,7 +97,7 @@ class UserServiceTest {
   void findByEmail() throws Exception {
     // given
     UserSignUpRequest user1 = createSignUpRequest();
-    userService.signUp(user1);
+    authService.signUp(user1);
 
     // when
     Optional<User> byEmail = userService.findByEmail(EMAIL);