计算机情报检索包括情报的存贮和情报资料的查询两个基本过程。在这两个基本过程中,都要牵涉到主题词的问题。主题词是情报资料存贮和情报资料查询的一种重要手段和方法,对于这些主题词的处理,便是对主题词的控制问题。主题词控制的好坏直接影响到情报资料的存贮与查询;使用主题词进行检索是计算机情报检索中的最重要的检索途径之一。所以说,主题词控制的好坏是一个计算机情报检索系统能否高效运行的关键。 Computer information retrieval, including the storage of intelligence and intelligence information query two basic processes. In these two basic processes, we must involve the subject of the question. Keyword is an important means and method of information storage and information inquiry. For the treatment of these keywords, it is the control of the keyword. The control of subject words directly affects the storage and query of intelligence information. Using keywords to retrieve is one of the most important retrieval ways in computer intelligence retrieval. Therefore, the control of the subject is good or bad is a computer information retrieval system can run the key to efficient.