synchronization information acquisition method of smart TV

The invention discloses a synchronization information acquisition method, device and system for a smart TV. The method comprises the following steps: when a mobile terminal is disconnected with the smart TV and is connected again, when a one-key synchronization instruction triggered by a user is received, obtaining an identifier of the reconnected smart TV; searching synchronization information corresponding to the identifier of the reconnected smart TV from a local cache, wherein the synchronization information is information of a current playing resource corresponding to the identifier of the reconnected smart TV stored in the local cache, and updating the state information of the synchronization information found in the local cache by using the obtained state information of the currentplaying resource corresponding to the identifier of the reconnected smart TV. By adoption of the scheme provided by the embodiment of the invention, the mobile terminal can accurately obtain the synchronization information of