diff --git a/src/main/java/com/stempo/api/domain/application/service/AuthService.java b/src/main/java/com/stempo/api/domain/application/service/AuthService.java
index 47583d6..b02ea11 100644
--- a/src/main/java/com/stempo/api/domain/application/service/AuthService.java
+++ b/src/main/java/com/stempo/api/domain/application/service/AuthService.java
@@ -6,7 +6,7 @@
 
 public interface AuthService {
 
-    String registerUser(AuthRequestDto requestDto);
+    TokenInfo registerUser(AuthRequestDto requestDto);
 
     TokenInfo login(AuthRequestDto requestDto);
 
diff --git a/src/main/java/com/stempo/api/domain/application/service/AuthServiceImpl.java b/src/main/java/com/stempo/api/domain/application/service/AuthServiceImpl.java
index de20ea3..ff2d49a 100644
--- a/src/main/java/com/stempo/api/domain/application/service/AuthServiceImpl.java
+++ b/src/main/java/com/stempo/api/domain/application/service/AuthServiceImpl.java
@@ -27,7 +27,7 @@ public class AuthServiceImpl implements AuthService {
     private final PasswordEncoder passwordEncoder;
 
     @Override
-    public String registerUser(AuthRequestDto requestDto) {
+    public TokenInfo registerUser(AuthRequestDto requestDto) {
         String deviceTag = requestDto.getDeviceTag();
         String password = requestDto.getPassword();
 
@@ -37,7 +37,8 @@ public String registerUser(AuthRequestDto requestDto) {
 
         String finalPassword = StringUtils.isEmpty(password) ? null : passwordEncoder.encode(password);
         User user = User.create(deviceTag, finalPassword);
-        return userService.save(user).getDeviceTag();
+        userService.save(user);
+        return jwtTokenProvider.generateToken(user.getDeviceTag(), user.getRole());
     }
 
     @Override
diff --git a/src/main/java/com/stempo/api/domain/presentation/AuthController.java b/src/main/java/com/stempo/api/domain/presentation/AuthController.java
index 86b217d..12a6b4b 100644
--- a/src/main/java/com/stempo/api/domain/presentation/AuthController.java
+++ b/src/main/java/com/stempo/api/domain/presentation/AuthController.java
@@ -23,11 +23,11 @@ public class AuthController {
 
     @Operation(summary = "회원 가입", description = "ROLE_ANONYMOUS 이상의 권한이 필요함")
     @PostMapping("/api/v1/auth/register")
-    public ApiResponse<String> registerUser(
+    public ApiResponse<TokenInfo> registerUser(
             @Valid @RequestBody AuthRequestDto requestDto
     ) {
-        String deviceTag = authService.registerUser(requestDto);
-        return ApiResponse.success(deviceTag);
+        TokenInfo token = authService.registerUser(requestDto);
+        return ApiResponse.success(token);
     }
 
     @Operation(summary = "로그인", description = "ROLE_ANONYMOUS 이상의 권한이 필요함<br>" +
diff --git a/src/main/java/com/stempo/api/global/handler/GlobalExceptionHandler.java b/src/main/java/com/stempo/api/global/handler/GlobalExceptionHandler.java
index 37ced90..de4b9ac 100644
--- a/src/main/java/com/stempo/api/global/handler/GlobalExceptionHandler.java
+++ b/src/main/java/com/stempo/api/global/handler/GlobalExceptionHandler.java
@@ -30,6 +30,7 @@
 import org.springframework.http.converter.HttpMessageNotReadableException;
 import org.springframework.security.access.AccessDeniedException;
 import org.springframework.security.authentication.BadCredentialsException;
+import org.springframework.security.core.userdetails.UsernameNotFoundException;
 import org.springframework.transaction.TransactionSystemException;
 import org.springframework.web.bind.MethodArgumentNotValidException;
 import org.springframework.web.bind.MissingServletRequestParameterException;
@@ -76,6 +77,7 @@ public ErrorResponse<Exception> badRequestException(HttpServletResponse response
             MalformedJwtException.class,
             ExpiredJwtException.class,
             UnsupportedJwtException.class,
+            UsernameNotFoundException.class
     })
     public ApiResponse<Void> unAuthorizeException(HttpServletResponse response, Exception e) {
         response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);