The invention discloses a metropolitan area network architecture based on service choreographer which comprises an application end, a service choreographer and an SDN controller, wherein the service choreographer is connected with the application end through a north interface and with the SDN controller through a south interface of Rest, and the SDN controller is connected with a metropolitan areanetwork, wherein the application end is used for initiating a service request. The service choreographer is used for uniformly arranging, configuring and distributing network services of all metropolitan area networks. The SDN controller is used for processing the service request. The application end at least comprises a Web UI end and a service opening system end. The method of the invention cancarry out flexible and customized programming based on user requirements; it can be scheduled and adjusted based on the traffic of the whole network. The invention breaks the traditional network equipment closed management and control mode, rapid deployment to build the entire network.