Synchronous updating method and device for different geographic achievement databases

The invention discloses a method and a device for synchronously updating different geographic achievement databases. The method comprises the following steps: acquiring a synchronization state table synchronized from a source library to a target library; the synchronization state table takes update identifiers of a current potential layer table and a historical layer table belonging to a source library and a target library as synchronization identifiers; comparing the update identifiers belonging to the current potential layer table of the source library, the historical layer table of the source library, the current potential layer table of the target library and the historical layer table of the target library with the synchronization identifier of the synchronization state table, and updating the current potential layer and the historical layer of the target library; and updating synchronization identifiers corresponding to the current potential layer table of the source library, the historical layer table