Boolean logic operators are often used in bibliographic retrieval pairs. Boolean logic operators are usually used in bibliographic retrieval. In the library OR online database, we can use Boolean logic operators (such as AND, or, NOT) to combine keywords, so as to find the required books or documents more accurately. Using Boolean logic operators can help us find the books or documents we need faster and more accurately. However, it should be noted that using too many operators may lead to too complicated or inaccurate results. Therefore, when using Boolean logic operators for bibliographic retrieval, it is necessary to select the appropriate operator and keyword combination according to the actual situation.