A subtitle processing method, comprising: receiving an identification code of a video file uploaded by a client; searching and finding out whether a subtitle file corresponding to the identification code exists or not in a video subtitle mapping database; if the subtitle file corresponding to the identification code is found, returning the subtitle search result to the client; or if no subtitle file corresponding to the identification code is found, searching for another identification code located in the same aggregation result for the identification code from a video aggregation database; according to the other identification code, searching and finding out whether a subtitle file corresponding thereto exists or not in the video subtitle mapping database; and returning the subtitle search result to the client. The above-mentioned subtitle processing method can improve the hit rate when searching for subtitle file. In addition, also provided are a subtitle processing device, a subtitle processing system and a storage medium.