In Chapter 25 of Laotzu (Tao Teh Ching), it stated: ”People follow the law of earth. Earth follows the law of heaven. Heaven follows the law of Tao. Tao follows the law of Nature.” There were various interpretations on ”nature” by different scholars. This article will not only examine the real meaning of Nature from the overall thinking system of Laotzu, but also will apply the insight of the forerunning scholars to consider ”Nature” shall be interpreted as ”the way it is”. Due to ”Tao follows the law of Nature”, therefore, people, earth, and heaven have all taken nature as a foundation, as a result, politics, socialization, and self discipline, have all been based on ”Nature”. ”Tao follows the law of Nature as principle”; ”Politics follows doing nothing and being nature as principle”; ”Life follows being natural and innocent at the end”; from these points, we may infer that ”Nature is the main idea on the theory on Laotzu.”