Abstract: This paper briefly reviews the present situation of development of network application system, in which genetic algorithm is used to group test paper, and puts forward the solution for RIA intelligent network examination system based on Flex and J2ee.The author proposes that the Hibernate framework technology is used as the persistence layer, Flex technology as presentation layer and Spring technology as business layer to put up rich internet application model.Resultsobtained show that this new framework is beneficial for the design of an intelligent network examination system with multi-hierarchy and high performance.