Water quality model is a key tool of water polluter transport and transform simulation. It is widely used in the field of water environment protection and water pollution prevention and cure. According to standard J2EE

satisfying expandability

maintainability of software and high rate of code reuse

taking application frame of middleware technology style as base

zero-water quality model as represent

adopting MVC software design model

water quality forecasting middleware is realized

water quality forecasting system that about Web is built

and the WebGIS technology visualization water quality simulation result is used. This system shortens model building period and enhances the model running efficiency.