diff --git a/photo-service/src/main/java/kr/mafoo/photo/service/ObjectStorageService.java b/photo-service/src/main/java/kr/mafoo/photo/service/ObjectStorageService.java
index e786aa3..9072cb6 100644
--- a/photo-service/src/main/java/kr/mafoo/photo/service/ObjectStorageService.java
+++ b/photo-service/src/main/java/kr/mafoo/photo/service/ObjectStorageService.java
@@ -39,7 +39,7 @@ public class ObjectStorageService {
     private long presignedUrlExpiration;
 
     public Mono<String> uploadFile(byte[] fileByte) {
-        String keyName = "qr/" + UUID.randomUUID();
+        String keyName = "qr/" + UUID.randomUUID() + ".jpeg";
 
         ObjectMetadata objectMetadata = new ObjectMetadata();
         objectMetadata.setContentLength(fileByte.length);
@@ -71,7 +71,8 @@ public Mono<String[]> createPreSignedUrls(String[] fileNames, String memberId) {
     }
 
     private URL generatePresignedUrl(String fileName, String memberId) {
-        String filePath = String.format("%s/photo/%s_%s", memberId, UUID.randomUUID(), fileName);
+        String fileType = extractFileType(fileName);
+        String filePath = String.format("%s/photo/%s.%s", memberId, UUID.randomUUID(), fileType);
         Date expiration = new Date(System.currentTimeMillis() + presignedUrlExpiration);
 
         return amazonS3Client.generatePresignedUrl(new GeneratePresignedUrlRequest(bucketName, filePath)
@@ -92,6 +93,10 @@ public Mono<String> setObjectPublicRead(String filePath) {
         });
     }
 
+    private String extractFileType(String fileName) {
+        return fileName.substring(fileName.lastIndexOf(".") + 1);
+    }
+
     private String generateFileLink(String keyName) {
         return endpoint + "/" + bucketName + "/" + keyName;
     }