Abstract: Tang Chun-i’s view of nature, i.e. a theory of the relation between self and nature, has been at least slightly neglected by researchers, but it is undoubtedly rather important to understand Tang’s idealism. Tang’s viewpoint about it contains three parts. Concerning ontologically, he holds there is a thing-in-itself, it can be transformed into humanized nature as mental activity; Epistemologically, the order of nature is mainly derived from the manners of mental activity, simultaneously he transfers the knowledge of nature into the knowledge of mind; In discussing the value theory, he reduces principally natural value to ego’s needs, and he also regards self as soul. Given mentioned above, Tang’s view on idealistic world emphasizes the role of mind too excessively, while he doesn’t grasp exactly the relation between self and nature .Therefore, Tang would not be aware of the character of ideal self completely. It confines, to a great extent, his constitution on self which would be conformed with the times.

Key words: Tang Chun-i, self, nature, idealism