Teaching the students how to search the special literature has been a traditional service of the Central Library of the TUB since 1958. The education is carried out by engineers working on the information department of the Library. The curriculum, the evaluation, the place in the schedule and the duration of the subject depend on the main subject of the given faculty. However, everybody gets the basic knowledge about the use of the library and abstract as well as about the UDC, The effectiveness of the user education is influenced by the motivation of the students, too. That is why since we show in the on-line information retrieval, their interest has been increasing.