This article to trusts the reliance interest from the major two legal systems the legislation present situation to obtain, pointed out strengthens and consummates the reliance interest protection the importance and the necessity .

To build a reliable market economical order, a wider, more intensive and practical reliance interest protection mechanism is essential.

The establishment of the trust protection principle results from the integration of democracy and the rule of law,marks the transformation of the formal rule of law into a substantive one,and is the inevitable requirement of building a government of credibility and under the rule of law.

The trust protection principle originated in Germany, through several decades development, it has become an important principle of administrative law in many countries.

Research on Trust-Protection Principles of Administration-Permission Law;