Server notice data synchronization and synchronization server migration method, system and device

The invention discloses a server notice data synchronization and synchronization server migration method, system and device which are used for solving the problems that the spending of a server side is great and the safety of personal information of a user can not be guaranteed in the existing server notice data synchronization process. The method comprises the following steps that: after a terminal receives synchronization notice information sent by a server, user data synchronization is carried out with the server according to sender number information of the server for sending the synchronization notice information and accessing authentication code information stored by the synchronization server when the synchronization notice information authentication passes. According to the embodiment of the invention, the synchronization notice information can be authenticated according to an accessing authentication code and a sender number of the server for sending the synchronization notice information; and the process does not need to be provided with a key and the sender number of the server is unique, so that the spending of the server side is small and the safety of the personal information of the user is guaranteed.