起源于英国行政法的正当期待原则,具有赋予相对人正当期待权利以抵御行政权恣意行事之功能。弄清行政法上正当期待的概念及产生途径,透视正当期待形成所需的信任关系和法律安定性原则这两个法理基础,就可以看出,信任关系是行政法上正当期待形成的深厚的精神基础和利益保障;而法律安定性原则则是行政法上正当期待形成的法律保障。 Originating from the legitimate expectation principle of British administrative law, it has the function of giving the relative right to expect the right to resist the willful act of the executive. To clarify the concept of legitimately expectancy in administrative law and the way it arises, we can see from the two jurisprudential foundations that we should expect the formation of the required trust relationship and the law of stability. We can see that the relationship of trust is a profound The spiritual basis and the protection of interests; and the principle of legal stability is the legal protection that lawfully needs to form.