Abstract: A new method for storing tree structures with unlimited depth and managing data with different formats in relation database is described in this paper, and a resource database management system is built with the aim of managing and sharing design data with different formats in a rapid design platform. Binary Large Object (BLOB) is used to store different formats of data, especially multimedia data, in the same database structure. Reverse order tree and the layer number of the tree node are used to store tree structures with unlimited depth in relation database. As a consequence, the resource data can be effectively and safely managed in the resource base platform based on network. The resource database constructed proved its advantages in terms of data utility, data re-use and data security.