Abstract:Hobbes is an important ethicist in the history of western ethical thought. Through the analysis of human nature, he puts forward that human passion, especially power desire, is the deepest motive that dominates human action, and power desire is the desire of human life for self-preservation and the most basic natural right of human beings. However, human beings, driven by the passion of power, are in a state of war because of human beings natural equality. People’s fear of death and people’s reason make people conclude a contract, agree to give up part of the rights to end the state of war and enter the political society. On the premise of contract, Hobbes put forward a series of natural law, namely, moral law. Secondly, because of the contract, people entered the political society and lived under the rule of the sovereign, Leviathan. Hobbes then argued that the ethical relationship between sovereigns and subjects was submission, and that submission was the greatest virtue. Therefore, Hobbes put forward two kinds of morality based on human selfishness: One is natural law morality based on equal rights, and the other is obedience morality based on the unequal relationship between sovereign and subjects.