This paper expounds the understanding and application of the financial management principles,emphatically analyzes the self-interested behavior principle,the signal transmission principle,the valuable originality principle and the comparative advantage principle.

To inquire into the behavior principles to the action of the nursing administrators, it is expounded in this article that the connotation of the behavior priciple; the using of the behavior principles in the nursing management.

Self-serving act of economic man s hypothesis corresponds basically with a lot of facts, and at the same time is totally proper.

By analyzing the judicial practices of American courts both theoretically and practically, and by comparing with other countries, this thesis mainly discusses the act of state doctrine in U.