Abstract: Based on the requirement analysis of the regional water pollution control(RWPC)CAP model,the structure of CAP model is designed in the UML,and the geodatabase is selected as the developing type of the CAP model. The det ailed developing process is introduced in the case of Foshan RWPC project. The CAP model,applied in RWPC planning,can improve its planning proficiency and the corresponding data coincidence.It is proved to be a convenient CAP solution.