【摘要】：我国的行政许可法的授予与实施中存在变更的必要性，本文就是通过借鉴合同法中情事变更原则的运用来完善行政许可法中变更、撤销、延续制度。信赖保护原则是行政许可变更最重要的原则依据，而情事变更与信赖保护都同样源于民法的诚实信用原则，两者从本源上讲是不冲突的，所以在行政许可法中是绝对可以运用情势变更原则的。但是由于行政许可法与合同法存在着诸多的差异，这就要求行政许可法在引入情事变更原则的时候必须做出一定的变化，主要是从程序上，结果上，时间上，原因上，主体资格上等方面出发来解决这一问题。最后是情势变更原则在行政许可法中应用后的一些制度安排。

【关键词】：行政许可、情势变更、公共利益、信赖利益保护

【Abstract】: The Administrative Licensing Law of the granting of the need for change exists. This article is by drawing on the principles of contract law in the circumstances the use of changes to improve the system. Administrative licensing trust protection principle is the most important principle to change the basis. The change of circumstances and trust are equally protected from civil law principle of good faith. Both terms are not from the source of conflict. So that talk can definitely use the principle of changed circumstances . But the Administrative Licensing Law and Contract Law, there are many differences. This requires the introduction of the Administrative Licensing Law of Change of Circumstance have to make some changes. Such as Time, Results, Reason, The subject qualification. Finally, the situation changed after the application of the principles that talk about some of the institutional arrangements.

【Key words】: Administrative license、Change of Circumstances、Public Interest、Trust benefit protection