To popularize simulation techniques in management system, a qualitative simulation method for group behavior is proposed in niew of the complex features of group system based on physical system oriented qualitative simulation approaches. It consists of classification and description of variables, description of fuzzy relationship, transitions of state variables, filter and simulation algorithm. Matlab 6.10 is used to code the filter, and Visual Foxpro 6.0 is used to code the transitions of state variable and simulation algorithm. An example is presented, which shows that the simulation results are consistent with the common senses in Organizational Behavior, the method can be applied to describe and forecast the change of group behavior. Some conclusions and further research are given.