In this paper, the common database interface methods on Intranet are studied and analyzed. Based on that, a new method using DB middleware under the Intranet environment is posed. The key point is to provide an efficient and powerful mechanism to manage database connection and data access to meet the needs of application requirements. It will improve the network performance for multi-user accessing database and optimize network transmission. It can provide the interface with the various RDBMSs (relational database management systems). The design considerations, the implementing and the critical techniques used are given and explained in detail in this paper.