the core issue in transformation period of society is about human beings and its key part – citizen moral character building. From the perspective of sociology, the essential point of citizen moral character building is the identifying and selection of public value and way of act. And Mo-tse's thoughts are one of the best ideological resources beneficial to the building process. Citizen character always follows “gentleman's doctrine” of Confusianism which is the basis of moral character shaping. Andit is the difference between Mo-tse's Universal love and Confucian kindheartedness that contributes to the complementation of the two thoughts; the universality between them pays way for Mo-tse's thoughts to go into the cultivation of citizen characters. Therefore the differences and universalities together determine their combination in building the Citizen Moral Character with Mo-tse's thoughts as the complementation.