本文在于重新厘清强行法的性质及其产生的原因以及违反强行法所生的结果。所谓强行法是指实证国际法中的一些规定,其为反映国际社会整体或极大部分国家的价值观的规定,此规定是由国家依据基础规范而创设的。本文借由强行法的性质、强行法性质产生的原因、违反强行法的行为及其效力、违反强行法的制裁、违反强行法的责任等议题间的结合,为连贯而有系统的探讨,呈现其间的关系。 The purpose of this article is to rediscover the nature of jus cogens and its causes, as well as the consequences of violating jus cogens. The so-called jus cogens refers to some provisions of the positive law of international law, which reflect the values ​​of all or most of the countries in the international community. These stipulations are created by the state on the basis of basic norms. In this paper, through the nature of jus cogens, the causes of jus cogens law, the acts that violate jus cogens law and its effectiveness, the sanctions that violate the jus cogens law and the responsibilities that violate jus cogens, The relationship between.