The evolution of ideas and facts in library science is due, as in other fields, to some personalities, because a field cannot exist in time if it does not have behind it those pillars on which a vocabulary or terminological language can be created. The terms from the biblioeconomic lexicon are grouped into lexical systems, isolated from the words from the common lexicon, and are correlated with other objectual-notional fields. The article presents an analysis of the structure of the terms in the field of romanian library terminology is generally mentioned as one of the main methods of researching terms in linguistics. Insights derived from statistical accounts of a domain's vocabulary can be useful in solving and clarifying specific qualitative and quantitative problems regarding language use. In the linguistic research regarding the library terminology, we rely on the information extracted from specialized publications, the research is about the 17452 grammatical terms and phrases.