diff --git a/pav-server/src/main/java/com/palnet/comn/storage/controller/StorageController.java b/pav-server/src/main/java/com/palnet/comn/storage/controller/StorageController.java
index 23934d5f..2a7ce449 100644
--- a/pav-server/src/main/java/com/palnet/comn/storage/controller/StorageController.java
+++ b/pav-server/src/main/java/com/palnet/comn/storage/controller/StorageController.java
@@ -22,11 +22,21 @@ public class StorageController {
     @Autowired
     private StorageService service;
 
+    /**
+     * 파일 업로드 기능
+     * @param file
+     * @return
+     */
     @PostMapping("/upload")
     public ResponseEntity<String> uploadFile(@RequestParam(value = "file") MultipartFile file) {
         return new ResponseEntity<>(service.uploadFile(file), HttpStatus.OK);
     }
 
+    /**
+     * 파일 다운로드 기능.
+     * @param fileName
+     * @return
+     */
     @GetMapping("/download/{fileName}")
     public ResponseEntity<ByteArrayResource> downloadFile(@PathVariable String fileName) {
         byte[] data = service.downloadFile(fileName);
@@ -39,6 +49,11 @@ public class StorageController {
                 .body(resource);
     }
     
+    /**
+     * 파일 삭제 기능.
+     * @param fileName
+     * @return
+     */
     @DeleteMapping("/delete/{fileName}")
     public ResponseEntity<String> deleteFile(@PathVariable String fileName) {
         return new ResponseEntity<>(service.deleteFile(fileName), HttpStatus.OK);
diff --git a/pav-server/src/main/java/com/palnet/comn/storage/service/StorageService.java b/pav-server/src/main/java/com/palnet/comn/storage/service/StorageService.java
index a364365d..cfe92eac 100644
--- a/pav-server/src/main/java/com/palnet/comn/storage/service/StorageService.java
+++ b/pav-server/src/main/java/com/palnet/comn/storage/service/StorageService.java
@@ -25,6 +25,11 @@ public class StorageService {
     @Autowired
     private AmazonS3 s3Client;
 
+    /**
+     * 파일 업로드 기능.
+     * @param file
+     * @return
+     */
     public String uploadFile(MultipartFile file) {
         File fileObj = convertMultiPartFileToFile(file);
         String fileName = System.currentTimeMillis() + "_" + file.getOriginalFilename();
@@ -34,6 +39,11 @@ public class StorageService {
     }
 
 
+    /**
+     * 파일 다운로드 기능. 아마존 S3에 있는 데이터 다운로드해주는 기능.
+     * @param fileName
+     * @return
+     */
     public byte[] downloadFile(String fileName) {
         S3Object s3Object = s3Client.getObject(bucketName, fileName);
         S3ObjectInputStream inputStream = s3Object.getObjectContent();
@@ -47,12 +57,22 @@ public class StorageService {
     }
 
 
+    /**
+     * 아마존 S3에 있는 데이터 삭제하는 기능.
+     * @param fileName
+     * @return
+     */
     public String deleteFile(String fileName) {
         s3Client.deleteObject(bucketName, fileName);
         return fileName + " removed ...";
     }
 
 
+    /**
+     * MultipartFile로 받은 객체를 File 객체로 변환
+     * @param file
+     * @return
+     */
     private File convertMultiPartFileToFile(MultipartFile file) {
         File convertedFile = new File(file.getOriginalFilename());
         try (FileOutputStream fos = new FileOutputStream(convertedFile)) {