Abstract: The article mainly discusses the research, design and accomplishment of the Cigarette Product Decision Support System (CPDSS) based on the Cigarette Marketing Manage Information System (CMMIS). The CPDSS involves versatile theories, such as the theory of Product Decision in terms of business administration, the popular three_tier hierarchical application system, and the software development technique based on Groupware. The paper describes the methods and process of establishing the application systems in great detail. It is available to the development of the CPDSS, for the CPDSS is a portion of the CMMIS. The process of CPDSS is divided into three steps-the structure analysis, the product orientation, feasibility authentication. Each step is relatively independent in function. The paper particularly expounds the new frame of the CPDSS and implementation of the components. And the integration techniques are provided in detail. The paper also presents the function hiberarchy of the CPDSS. To resolve the structure analysis, this dissertation brings forward Product Life Cycle and Prediction Groupware. Multi-factor analysis and Emulation mode are used to implement the product orientation. The feasibility demonstration is accomplished by using the Market Survey based on Multiple Goals Decision-Making and Financial analysis. Furthermore, the paper makes a statement of the methods to accomplish the Module Groupware.