从20世纪80年代以来,图书馆学界对图书馆学方法论的研究取得了很大进展。但对方法论的体系和内容,以及专门方法的表述和判断标准有着不同的观点。本文认为层次说更具有理论体系构建的意味,有利于建立科学的图书馆学方法论体系;专门方法的判断标准是①体现图书馆学的学科规定性;②具有认识价值的独特性,两个方面相互联系共同构成判断标准的完整内容。 Since the 1980s, great progress has been made in the field of library science methodology in library science. However, there are different opinions on the system and content of the methodology, as well as the formulation and judgment criteria of specialized methods. This paper argues that the hierarchy theory has the meaning of building a theoretical system and is conducive to the establishment of a scientific methodology system of library science. The judgment criteria of specialized methods are: (1) the disciplinary stipulation of library science; (2) the uniqueness of cognitive value; (2) The interconnectedness constitutes the complete content of the judgment criteria.