Abstract: The present invention provides a seamless game world system in the field of massively multiplayer online games, comprising a plurality of game servers and at least a client, each of the game servers being assigned to a zone in the game world divided into zones. The seamless game world comprises: a game logic computing module for computing an avatar's new status; a map controller for detecting whether an area of interest of the avatar has crossed the border of a host server of the avatar and spanned neighbor game servers based on the avatar's new status computed by the avatar computing module, and determining to make/delete a clone on a neighbor game server or synchronize the clone's status based on the detected result; and an avatar status update module for performing a normal status update on the avatar based on the computed result of the game logic computing module after the map controller notices its neighbor game server to delete the clone from an avatar list.