讨论情报检索过程中的３个概念：提问概念、检索概念和标引概念，论述提问概念和检索概念的形成过程和特点及用检索概念替换提问概念的必要性。并结合具体实例提出如何进行概念替换。 The three concepts in the process of information retrieval are discussed: the concept of the question, the concept of the search and the concept of the index, the process and characteristics of the question and the concept of the search, and the necessity of replacing the concept of the question with the concept of the search. Combined with concrete examples, we propose how to replace the concept.