The agility of SOA (Service-Oriented Architecture) can response changes of business process effectively. To meet the requirements of rapid building business system for personality and high-speed changes based on business model, SOA was introduced. In this paper, firstly, the information system architecture based on SOA was built, moreover, Ajax (Asynchronous Javascript and XML) technology was adopted to create clients based on traditional B/S(Browser/Server) structure,, which enhanced interaction and feasibility; Secondly, the method for rapid building business system was proposed, also the algorithms for workflow control and code generator was brought forward; Finally, the code generators, to reduce the complexity of the software development, is also provided.