This paper starts from concept of anonymity and combines organlzation behavior with managerial psychology.Firstly，we analyze the positive and negative effects of anonymity in an integrated& systematm way.Secondly the concept of anonymous intensity is put forward according to the anonvrr1ous operation degree in practice．Thirdly，major factors tHat influence the anonymous intensity are analyzed． Fina11y，the paper discusses the effective application of anonymous intensity with considering the goal of group task，task type and group features to improve the group performance