Librarians are directly involved in process of conservation of deposited documents. With the appearance of ditization, the acces to old documents and other historical materials become public, that consequently opens up the educational opportunities. Role of the National Library in society consists in accumulation and conservation of the national intellectual heritage through organization, processing, access and availability, preservation of the national documentary heritage in any form. National Library has a mission to valorize scientifically their patrimonial collections. The annual portfolio of the National Library of the Republic of Moldova includes appr. 30 tltles of publications, some of them became a visiting card of the library: National Bibliography of Moldova (series: Official publications, Disserations, Moldavistica), National Calendar, Biblioteconomy of Moldova: Regulation settings, The image of the Republic of Moldova abroad, bulletin Culture in Moldova, Chronicle of politico-administrative, social-economic and cultural life of Moldova, collections of documents and materials Bessarabians in the world, etc.