In CHENG & ZHU's Neo-Confucianism, the "Removing Human Desire and Preserving Ethics" is the standards of moral behavior. CHENG & ZHU both consider that Ethics and Human Desire are contradictory relations. But Wang Fushi try to construct New theory that want to balance the Ethics and Human Desire. In Wang Fushi's theory we have to value human' desire, because only understand what is common human' desire can we find the rule of Ethic. The core different views between Zhu Xi and Wang Fushi are "what is real rule of Ethics" and "how to structure the rule of Ethic". This article try to compare the thought of Zhu Xi and Wang Fushi, and rethinking the purpose of Wang Fushi's view of Ethics and Desire.