This paper describes a web-based project management system (PMS) for large-scale and complex agricultural scientific research projects which need the cooperation among scientific research institutions located in different areas. This teamwork system integrated with the modem project management bases on workflow and combined the Internet with communication networks to manage the research process in a collaborative web environment. It comprises seven major parts, including administrator management, financial management, achievements management, documents management, popularize and application services management, communication management and progress management, achieving the goal of data sharing and cooperative research and speeding up the progress of the projects. An application for the public service agriculture research project "Northern Fruit borer monitoring and research and demonstration on the prevention and control technology" is presented.