Abstract: The relationships between nature and man was a fundamental proposition in the pre-Qin philosophies as well as the important content of Zhuangzi’s philosophy.The concept“tian”in Zhuangzi includes three connotations:nature as the noumenon, the natural state and the surpassing spiritual state.On the one hand, Zhuangzi believes that nature and man are in opposition and the two are separate when man is of heterization, behaves abnormally and has lost his nature.On the other hand, the work insists on man as an integral part of nature, which is the Zhuangzi’s terminal orientation.As the internal structure, “tian”is connoted in the individual’s nature.Only when man imitates nature’s behaviors and does everything when doing nothing can he be the real part of nature.