diff --git a/ncm/file_util.py b/ncm/file_util.py
index 5ffd4e2..b2303ba 100644
--- a/ncm/file_util.py
+++ b/ncm/file_util.py
@@ -1,9 +1,22 @@
 # -*- coding: utf-8 -*-
 
-from mutagen.id3 import ID3, APIC, TPE1, TIT2, TALB
+from mutagen.mp3 import MP3
+from mutagen.id3 import ID3, APIC, TPE1, TIT2, TALB, error
 
 
 def add_metadata_to_song(file_path, cover_path, song):
+    # If no ID3 tags in mp3 file
+    audio = MP3(file_path, ID3=ID3)
+    if audio.tags is None:
+        print('No ID3 tag, trying to add one!')
+        try:
+            audio.add_tags()
+            audio.save()
+        except error as e:
+            print('Error occur when add tags:', str(e))
+            return
+
+    # Modify ID3 tags
     id3 = ID3(file_path)
     # add album cover
     id3.add(
diff --git a/ncm/start.py b/ncm/start.py
index 9ad0522..97dd8a6 100644
--- a/ncm/start.py
+++ b/ncm/start.py
@@ -67,31 +67,3 @@ def main():
 
 if __name__ == '__main__':
     main()
-
-
-# song = api.get_song('464035731')
-# print('song id:{}, song name:{}, album:{}'.format(song['id'], song['name'], song['album']['name']))
-
-# from mutagen.mp3 import MP3
-# from mutagen.id3 import ID3, APIC, error
-#
-#
-# file_path = '/Users/codezjx/Downloads/test.mp3'
-# cover_path = '/Users/codezjx/Downloads/test.jpg'
-#
-# audio = MP3(file_path, ID3=ID3)
-# if audio.tags is None:
-#     print('No ID3 tag, try to add one!')
-#     try:
-#         audio.add_tags()
-#     except error:
-#         pass
-# audio.tags.add(
-#     APIC(
-#         encoding=3,        # 3 is for utf-8
-#         mime='image/jpg',  # image/jpeg or image/png
-#         type=3,            # 3 is for the cover(front) image
-#         data=open(cover_path, 'rb').read()
-#     )
-# )
-# audio.save()