diff --git a/src/main/java/trothly/trothcam/service/auth/UserDetailServiceImpl.java b/src/main/java/trothly/trothcam/service/auth/UserDetailServiceImpl.java
index 9cfc5f4..b71b999 100644
--- a/src/main/java/trothly/trothcam/service/auth/UserDetailServiceImpl.java
+++ b/src/main/java/trothly/trothcam/service/auth/UserDetailServiceImpl.java
@@ -1,6 +1,7 @@
 package trothly.trothcam.service.auth;
 
 import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.security.core.userdetails.UserDetailsService;
 import org.springframework.security.core.userdetails.UsernameNotFoundException;
@@ -10,6 +11,7 @@
 
 import static trothly.trothcam.exception.base.ErrorCode.MEMBER_NOT_FOUND;
 
+@Slf4j
 @RequiredArgsConstructor
 @Service
 public class UserDetailServiceImpl implements UserDetailsService {
@@ -18,7 +20,12 @@ public class UserDetailServiceImpl implements UserDetailsService {
     @Override
     public UserDetails loadUserByUsername(String memberId) throws UsernameNotFoundException {
         System.out.println("로그인한 memberId : " + memberId);
-        return (UserDetails) memberRepository.findById(Long.parseLong(memberId))
+        UserDetails result = (UserDetails) memberRepository.findById(Long.parseLong(memberId))
                 .orElseThrow(() -> new BadRequestException(MEMBER_NOT_FOUND));
+
+        log.info("UserDetails: " + result.getUsername());
+        log.info("UserDetails: " + result.toString());
+
+        return result;
     }
 }