本文认为应该以图书馆实践所涉及的特有的现象领域作为图书馆学研究对象专指性的划分标准 ,并且 ,通过对比论证 ,得出了“知识单元可获得性说”是目前所有的图书馆学研究对象的观点中 ,唯一准确包括了图书馆实践领域的观点的结论 This paper argues that we should regard the specific phenomenon areas involved in the practice of library as the dividing criteria for the specific research object of library science. And through the comparison and argumentation, it is concluded that “knowledge unit availability” is the current library From the point of view of the subject of study, the only conclusion that accurately includes the viewpoint of the field of library practice