常识性知识处理是人工智能研究的核心难题 .在分析了对常识的各种研究工作的基础上 ,论述了一个面向Agent的大规模常识知识库 .提出了一种新型的Agent———CBSAgent,描述了面向常识的语义网络描述语言Csnet,对Prolog进行了面向常识的扩充 ,分析了常识知识库的本体论结构 ,最后给出了常识知识库的运行机制 The common knowledge processing is the core problem of artificial intelligence research.On the basis of analyzing all kinds of research work on common sense, this paper discusses a large-scale common knowledge base facing Agent.This paper proposes a new type of Agent --- CBSAgent, Describes the semantic network description language Csnet which faces common sense, extends Prolog to common sense, analyzes the ontology structure of common knowledge repository, and finally gives the operation mechanism of common knowledge base