Unlike the traditional definition of"ethics and morality"in"virtue",the definition of"vir-tue"in Laozi's philosophical thought is mainly reflected in its relationship with"Dao".This article ex-plains the meaning of"virtue"in Laozi's philosophical thought from three aspects:the"virtue"of"superi-or De"and"inferior De",the"virtue"of"metaphysical De"and"physical De",and the"virtue"of"Dao"and"virtue".