In the Paper are analyzed and comparatively shown the fundamental premises of two National Rules for Cataloguization, and its application which marked the ascending line in the development of the Yugoslavian cataloguing theory and practice. The «Rules for Cataloguization» arised as the Result of the cataloguing practice of central Institutions in Serbian Librarianship - Library and Information Science- the National Library of Serbia and the University Library «Svetozar Marković». They added and expanded theoretical postulates, that were gradually sublimated in the core of the cataloguing theory on the international level, applied for more than two decades, from 1957. until the second half of the 1970s, within every types of Library in Serbia, and with an important part in Libraries of Montenegro and Bosnia and Herzegovina. The adoption and application of the «Rules and Guide for the creation of the alphabet catalogue. Part 1,2», by Eva Verone, in practice, was called for many reasons «Yugoslavian Rules», and it has indicated the introduction of international standards and the approach to the Anglo-American cataloguing principles. In the context of the revolutionary and dynamic changes in all spheres of the Library activities and of the dominating e-publishing, the questions of redefining the National Cataloguing Rules are again actual, and in this process, the experience, the methodology and the organization of the AACR/2 can serve as a valid and appropriated theoretical frame.