Abstract: The psychological thoughts of nature and habit which represent the course of history over 200 years of Han Dynasty can be summarized as: the theory of "following the natural law and going back to nature" in Huai Nanzi, Dong Zhongshu's thoughts of "nature needs instruction to become goodness" and Wang Chong's ideas of "men are born good or evil, who may be reversed by practice". These ideas were not only the culmination of all those good at that age, but also possess the values of enlightening and being used for reference for modern psychological research.

Key words: Psychological thoughts of nature and habit, good and evil, Dong Zhongshu, Wang Chong