Abstract: Classical Confucian learning, after series of philosophically breakthrough at axial age, comes to the surpassing world that is separated to that of realistic in a state of keeping apart but not afar, and reaches an end of inner transcendence. In the course of transformation, Mencius philosophical breakthrough is critically of great importance due to his contribution as a classical Confucianism thinker serving as a link between past and future, which is presented both in the promotion to the inner transcendence on the basis of Confucius and in the basic step from intention to self-cultivation and even to serving heaven.