Frankfurt School deepened and developed the western tradition of selfcriticism, absorbed new achievements in social sciences, criticized the ideology of capitalism and its social realities thoroughly.As a humanistic criticism, “critical theory” paved a different way from “traditional theory”. It aimed at criticizing the present and human himself instead of criticizing for criticism itself. Meanwhile,“critical theory” also generated rich influential theoretical fruits. The critical spirit behind it is still enlightening for us to analyze and think about the social problems of capitalism nowadays.