The Report Management System Generator for web application is aimed at designing and generating the report needed by several business systems in the project of "Comprehensive Demonstration of Water Environment Management about LiaoHe River Basin". The article elaborates the basic architecture of Report Management System Generator and introduces the basic thoughts about designing report templates based on Cell-Plugin and the corresponding function library module. Finally, it reasearches the extended module and proposes its algorithms in the Report Generator. Therefore, it could check the circular dependency of Formula and accomplish the data transfer between the Client and Server. The Roport Management System Generator has been initially realized already. This tool can be applied to generate the complicate style of Chinese Report and meet the needs in different industries.