Method and device for client side and server side data synchronization

The invention discloses a method and device for client side and server side data synchronization and belongs to the field of database technologies. The method includes the steps that total data of a data object of a server side at a first moment are obtained; according to version numbers of data records, incremental data, changing relative to the first moment, of the data object of the server side at a second moment are obtained, wherein the second moment is later than the first moment; the total data and the incremental data are merged, so that total data of the data object at the second moment are obtained. According to the method and device, the number of times of interaction and the data size of interaction transmission between the client side and the server side can be reduced, and storage consumption of the client side can be reduced.