The invention relates to a method and a system for synchronously controlling multiple screens. The method comprises the following steps of controlling a service terminal to acquire synchronous information, parsing the synchronous information, according to the parsing result, matching a target terminal, obtaining the control right of the target terminal, and shifting the control right to a source terminal, so that control on the synchronous content of the target terminal by the source terminal is realized. The invention realizes control synchronization of fine grit on the basis of synchronous information, meanwhile, separation between data stream of services and control stream of synchronous control of a plurality of pieces of equipment is realized, and the services are convenient to develop and expand.