Abstract: A kind of intelligent application mode, viz. remote agronomic intelligent diagnosis and decision making support system (RAIDDSS), is proposed. This kind of application system overcomes the limitation of space and time, thus extremely extends the service and service region. Base on the key factors analysis of remote intelligent diagnosis and decision making support system, this paper details the realization of knowledge base, analysis model and database (called three bases) design and the integration of the three bases. The integrated system constructs the platform of RAIDDSS. As for the universal system interface within RAIDDSS and RAIDDSS with other systems, a standard XML is used to realize the information exchange and to open a potential base for group server distributed in various places.