Service data processing method and system for server with coexistence of new version and old version

The invention discloses a new and old version coexistence server service data processing method and system, and belongs to the technical field of server service data processing. The problems that an existing program needs to be paused to receive a service request and new and old versions of programs cannot coexist when a server performs program upgrading in an existing method are solved. The version mapping table containing the corresponding relation between the client program version and the server program version is stored in the server, and due to the fact that the version mapping table comprises the client program of the new version and the client program of the old version, the server is also suitable for service data processing of the client program of the old version. Moreover, the program version corresponding relation in the version mapping table can be updated offline, the running client program does not need to be closed or paused during updating, and the running client program can continue to rece