Remote interaction method of multi-screen synchronous display supporting QoS

The invention discloses a remote interaction method of multi-screen synchronous display supporting QoS. The remote interaction method comprises steps of establishing an interaction platform of synchronous display; sharing file source data bags of synchronous interaction; entering a synchronous interaction interface; performing synchronous interaction; exiting the synchronous interaction interface; and canceling the interaction platform. According to the invention, the file source data bags are firstly shared to the interaction platform, so a user end should load the file source data bags containing larger data amount in advance, and then can enter the synchronous interaction interface to perform synchronous interaction with other user ends. During the synchronous interaction process, instruction information containing smaller data amount and file source update logs are mainly transported and interaction of multi-screen synchronous and precise procedures is achieved.