Add "trans-database retrieval" and "re-organization" in the front end of network database management system are put forward to settle the difficulty in data sharing caused by the interior and exterior isomer, and a corresponding solution with corresponding practice is designed. 提出在网络数据库管理系统前端增加跨库检索和重新组织模块,以分别解决内和外部异构带来的数据共享困难,并设计了相应的解决方案,进行了相应的实践。