Abstract: This paper expounded following points with case: individual retrieve service in library is a service that provided on the basis of reader’s demand. Most of demand have professional background, so the service must be “ one to one ” , which include document retrieve and retrieve on line. In retrieving for readers, we can meet many information that had different original sources and different substance. Only discard the dross and select the essential, eliminate the false and retain the true, even on the spot investigation, compile and provide first, second and third time documents, can we hand in a satisfied examination paper to readers.