Thehydrological database based on SL.324-2005 standard table structure has brought great convenience for hydrologie data manage-ment. However, because the design of the database is data management-oriented, it is not easy for users to read, understand and fully utilize.Based on the above ssues, this paper designed and built a prototype system for hydrological data integration.The interpretation and transforma-tion of hydrologicaldatabase makesthe hydrological data in a beler and more consistent way of the human cognitive habits and present to users foreffctively achieving the targeted extraction,management, presentation and analysis of hydrological data and alsolays an important foundation forhuman-computer interaction and statistical analysis based on hydrologicaldata.