本文论述了一个基于层次知识结构的一般性系统的设计思想和设计方法.凡其知识可以概括为层次结构的领域,均可使用本系统,完成知识的表示、组织、扩充和利用.目前系统的知识利用操作有交互式检索浏览、自然语言(英语)问题回答、决策咨询三种.系统已在医疗诊断和农业生产咨询两个领域中显示了其实用性,是一个层次结构型通用的专家系统.它表明基于知识的模式识别的原理可以应用到人工智能专家系统的设计中. This paper discusses a general system based on the hierarchical knowledge structure design and design methods.Where its knowledge can be summarized as the hierarchical structure of the field, can use the system to complete the representation of knowledge, organization, expansion and utilization of the current system There are three kinds of knowledge retrieval operations: interactive search, natural language (English) question answering and decision-making consultation.The system has shown its practicality in the two fields of medical diagnosis and agricultural production consulting and is a hierarchical general-purpose expert system It shows that the principle of pattern recognition based on knowledge can be applied to the design of artificial intelligence expert system.