Abstract: The Nicomachean Ethics and Politics are the main books on Aristotle’s theory of virtue.Virtue is one of the most important concepts in the Nicomachean Ethics,according to his rational way in metaphysics and logic,Aristotle claims that a citizen’s happy life must be based on his moral practice in society.And Politics makes this practice possible by its social morality and politics.All the real city-states should act according to justice,and only in the unity of individual’s virtue and social morality could justice be realized.