元伦理学是应用逻辑和语言学的方法来研究道德问题的一套理论体系。关于善、恶、正当、公平、正义等伦理学中的核心概念的意义以及如何定义它们,元伦理学有他们自己的一套理论观点和方法。本文就元伦理学中的三个主要学派在这方面的理论观点做一初探。 Meta-ethics is a set of theoretical systems that apply the methods of logic and linguistics to study moral problems. Metabolism has its own set of theoretical perspectives and methods on the meaning of the core concepts in ethics such as goodness, evil, fairness, justice, and how to define them. In this paper, the three major schools of meta-ethics in this area to do a theoretical point of view.