The embodiments of the present disclosure disclose a method, a device, a server and a system for synchronizing member benefits among multiple devices. The method comprises: acquiring an identity of a device as a current device identity, and acquiring a member account logged on the device; sending a synchronization request regarding the current device identity and the member account to the server; and receiving a synchronization result returned by the server, the synchronization result being a result of synchronizing a member benefit and a corresponding member duration of the member account regarding a device identity to be synchronized with a member benefit and a corresponding member duration of the member account regarding the current device identity acquired by the server through querying, and the device identity to be synchronized being different from the current device identity. According to the embodiments of the present disclosure, the member benefits and the corresponding durations of the same account regarding different devices are searched through the server, and then synchronized, so that a function of sharing the member benefits of the same account among multiple devices is achieved.