The present invention provides a file sharing system and a corresponding file sending and receiving method and device, and relates to the file sharing technology field. The file sharing system comprises a file sending device and a file receiving device, the file sending device comprises a file format conversion module, a file analyzing module, a first file compression module, a second file compression module and a file sending module, and the file receiving device comprises a file receiving module, a first decompression module, a second decompression module and a file format conversion module. A document is split into the small fragments according to pages and is compressed better, so that the document sharing timeliness can be realized, and the page split also realizes the page synchronization of the document sharing control. Meanwhile, in order to guarantee the document watching quality and the document versatility, the document conversion format is an enhanced metadata file format, and the files can be displayed on a Windows platform without needing to install other tools.