Abstract: This paper achieves the system function by using Flex technology, which is one of the technologies to implement RIA. The system uses Cairngorm framework as a program design model while using serviceoriented architecture middleware platform to realize business logic tier. A unified, orderly and efficient operation is created to supervise enterprise project processes, project management, personnel management, financial management and other activities. The system operation is very convenient and has a good maintenance. It also enhances user experience.

Key words: Flex, Cairngrom, middleware, enterprise application design