本文根据悖论的字源,把悖论分为三种类型,并结合历史分析找出产生悖论的三个认识论原因,然后分析了人们如何去发现、解决和消除悖论。同时还论及了悖论在科学中的作用。悖论对科学的作用,已越来越被人们重视。已有一些文章对悖论问题作了有益的阐述,而对悖论产生的认识论根源则似乎分析不够,本文试图对这一点提些看法,并论及悖论在科学中的作用。 Based on the source of public opinion, this article divides the public opinion into three types and combines historical analysis to find out the three epistemological reasons that generate public opinion. Then it analyzes how people discover, solve, and eliminate public opinion. At the same time, it also discussed the role of public opinion in science. The role of public opinion on science has been increasingly valued by people. There have been some articles that have usefully expounded the issue of public opinion, and the epistemological roots of public opinion have appeared to be insufficiently analyzed. This article attempts to make some comments on this point and discusses the role of public opinion in science.