System and method for negotiating device information and device thereof are disclosed by the various embodiments of the present disclosure. The method includes the processes as follows: sending, by a network entity initiating a data synchronization process, a data synchronization initialization request carrying the identifier of the network entity initiating a data synchronization process to a destination network entity of the data synchronization process; accessing, by the destination network entity of the data synchronization process, the network entity for storing device information according to the identifier, acquiring the device information corresponding to the identifier according to the stored corresponding relation and the stored device information, and sending out a response to the network entity initiating the data synchronization process. With the system, method and device thereof provided by the various embodiments of the present disclosure, the data transmission flow is decreased and the time for the data synchronization is saved.