Sociology is by nature a transformed type of philosophy of history. Like philosophy, sociology inquires fundamental and radical questions, on the one hand, and like philosophy, the raison d'etre of sociology is also based upon its special viewpoint, on the other. Therefore, learning sociology, like learning philosophy, means learning a special viewpoint. The key of the sociological viewpoint is seeing everything through its "social conditions", dispite of its self-identified nature or its complicated its structure if there is any. The following four kinds offactors are the so-called "social conditions": (1) the patterns and the modes of living, generally called "culture" or "social structure", which are configurated within a given historical " space and time; (2) those media and arrangements, including factors such as ideas, activities, population, technology and geography, mainly through which people's life styles are configurated; (3) the needs to classify and to arrange things in order according to priority and emergency which are indispensable in group life; (4) the psychological mechanisms and dramaturgical strategies by which people usel handle their daily interactional situations in order to keep their own identity aa self-respect. The concept of "society" in sociology is different from that in ordinary usagi It belongs to the unconscious sphere of everyday life and can only be comprehended by going behind ordinary people's taken-for-granted knowledge. This is why those students who have been well-trained in sociology just appeart to be on the same lines, while in fact being "ecstatic", with the ordinary people.