On the basis of analyzing IDSS (Intelligent Decision Support System), analyze the total structure, the function principle and the key technology realization of model base management system. Combine the relation database technology, research the model generation display and storage level structure and realize the based storage and management of model. The result shows that the classification base storage according to level structure is realized, the model storage extension. Use level coding to create the model catalog tree, the level is clear. Finally, the model storage management is implemented, which improves the extendibility of system and will be a reference for technologists in the development of IDSS.