Laozi’s Tao Te Ching is an ideological system with rich connotation. Its philosophical essence can be generalized in eight levels: to discuss the ontology with Torism, to interpret the laws with Torism and Morality, to cover contradictory with Yin and Yang, to summarize minimax criteria with “reactionary”, to believe weakness over strength, to argue function with both “with” and “without”, to emphasize intuition while weakening perception, to govern by doing nothing. In the long ancient society, Laozi’s thoughts were not only applied to state governance, ancient science and technology, health persevering, the use of military force, and so on, but also set great influence on the development of ancient Chinese civilization.