In view of the lack of effective technical means to exchange data between the business systems of the current grid， provincial， and regional grid dispatching centers， a trans-regional collaborative work system of vertical， horizontal system service center is proposed. The new system has solved the current redundancy between the levels of dispatching business and work flow integration， and strengthened the reuse of the various system foundations， public announcement and advantage service. Thus the integration of the electric power dispatching information management system is formed to improve the management level of dispatching organization. The service center has already passed the verification of engineering application and is in operation.