Abstract: In the world society, state power depends on comprehensive state power with purpose of guarantee national safety, the standardization and legality of which are lower than domestic power, with multi-functions. The cause for the difference between international power and domestic power is decided by the field differences of the international society and domestic society, and the field influences state power in two ways. Physical structure of the field determines differences of the state power in subject and object, and in origin and aim of the state power. The second is the effectiveness and efficiency of the rules. In the international society, the weakness of the rules causes weakening of legality and standardization of the international power, and makes the power with multi-forms.

Key words: Theory of state power, international power, field differences