Media file playing method and system, player, terminal and media storage platform

The invention discloses a media filter playing method and system, a player, a terminal and a media storage platform, relating to the media playing technology. The method comprises that the media player obtains an index file of a media file from the media storage platform, and the index file is generated in advance and comprises key information which is required for playing the media file by the media player; the media player obtains the key information of the media file according to the index file; and the media player plays the media file according to the key information of the media file. According to the method, system, terminal and platform, when the media file at a far-end platform side is played at a terminal side, the terminal side scans the media file locally, obtains the key information required by the media player, and generates the index file; when media playing software at the terminal side plays the media file of the platform side, real-time scanning of the platform-side file is avoided, instead, the media file is played by obtaining information from the index file; and thus, playing of the media file can be rapidly started, and the latency is shortened.