University librarians are usually awarded the title of teacher or corresponding treatment. However, in general understanding, librarians are often misunderstood as librarians or mistakenly believe that their job is only to borrow and return books. In fact, librarians usually refer to non-professionals who are responsible for the circulation of books and the sorting and auxiliary processing of books in the library. There is a great difference between librarians and librarians in their work.

Traditionally, library services are divided into two categories: one is technical services, mainly including acquisition, classification and cataloging, system support, etc. Another kind of reader service includes circulation service, reference service, thematic service (thematic research guidance) and information literacy education. Librarians with different functions need to master different knowledge and skills. Therefore, librarians can be divided into interview librarians, cataloguing librarians, system librarians and reference librarians according to their functions.

With the digitalization of library resources carriers and forms, library collections are no longer limited to traditional physical knowledge carriers such as books, newspapers, periodicals and microfilms, but also include various virtual knowledge resources such as electronic databases. Librarians not only need to be familiar with various forms of knowledge resources, but also need to master a variety of information technologies. They can build and develop library resources according to the needs of readers, process, describe and analyze knowledge resources, judge and evaluate the quality of knowledge resources, and report or recommend them to readers, thus providing in-depth and effective knowledge services.

Ideally, librarians should not only have a bachelor degree or above in library science (or information management, also known as library science in Taiwan Province Province) or related majors, but also often need to master at least one other subject knowledge at the same time. Therefore, librarians, especially reference librarians, are often required to be sages with at least one or more master's or doctoral degrees.