行政合法性原则是行政法基础理论的重要组成部分。人民法院之合法性审查原则乃是对具体行政行为是否合法而并非是否违法进行审查。从逻辑上看 ,违法必然不合法但不合法未必就是违法。合法性审查的对象是具体行政行为是否合法而并非相对人行为是否合法。 The principle of administrative legality is an important part of the basic theory of administrative law. The principle of censorship of people’s courts is to examine whether the specific administrative act is legal and not illegal. Logically, the law must not be illegal but not legitimate is not necessarily illegal. The object of the legality review is whether the specific administrative act is lawful and not whether the relative act is legal or not.