Abstract: Going deep into the arrangement of knowledge unit of the document and exploiting the information resources is a prerequisite for library to unfold the knowledge information services .The author discusses the meanings and the many-sided functions of exploitation of document information resources of libraries during the transformation period and holds that the basic tasks are the investigation and study of document resources,the investigation and study of the reader requirement,the working out a exploitation plan and the produce standards, defining the item and their implementing steps.

Key words: Document Information Resources,Exploitation of Information Resources,Information Products,Information Services,Libraries during the Transformation Period