A method and a device for synchronously performing an operation on contents. The method comprises: sending a synchronization instruction to one or more terminals, the synchronization instruction being used for instructing the one or more terminals to synchronously perform an operation on contents to be operated in synchronization. According to the embodiments of the present disclosure, respective terminals that have received the synchronization instruction, such as mobile terminals, are enabled to synchronously perform an operation on the contents to be operated in synchronization, which effectively achieves consistency of synchronization time.