In view of the wide area flowing， security and system integration characteristics of power dispatching workflows， an analysis is made of the characteristics of the power dispatching process. For the purpose of implementing the wide area distributed dispatching process， a distributed workflow design integrated with the e-mail service based on the intelligent power dispatching technology support system platform is put forward. The workflow service transmits the process file described with highly efficient E language as an e-mail by calling message e-mail service. The destination workflow service downloads and passes the e-mail so as to implement the distributed process flowing. The mechanism is discussed in detail， the principle of integration between the service bus and other services or systems is demonstrated， and the integration is implemented according to the design. Application in security checking shows that the mechanism is of applicable value for its satisfaction of the requirement of distributed service while the power dispatching process is flowing among systems.