The Report analyses the questions of data synchronization of remote technical support system based on C/S mode, Then it proposes a Network framework of Remote Technical Support System Based on levels service. The framework breaks down the mode of unified service of distributed system. It thinks all of the nodes is equal, they send or receive the message which is decided by users. These nodes transmit message one by one, and have abilities of data synchronization equally and unlimited expand. The method is used by video monitor system of remote technical support system, and it tries out on military network.