The definition of private benefits from control (PBC) will decide the value tropism of the control power. The existing literatures deem PBC is the exploitation of the monitory stockholders. This kind of theory can not explain exactly the contest of control power. This paper reviews all those literatures about the source and property of PBC and the correlation problems. The conclusion is that the control power becomes a kind of independent economic right, so the master or exertion of it should exist legal profits. This kind of interpret has im...