图书馆信息学或图书馆信息学（英语：library and information science, LIS）学名结合自两大领域：图书馆学与信息学。

一般来说，出版学、图书馆学、情报学、档案学、博物馆学和文献学在文献分类中同属于一个大类，但图书馆学、情报学、档案学和文献学的关系更加紧密，同属一个上位类，而出版学和博物馆学与之关系较远一些。

情报和信息都是英文information的汉译，转译自日文。中国大陆目前一般都把情报称为信息，**称为资讯。广义上信息泛指自然界和社会领域传递的一切消息。经过整理而有序化的信息方可成为情报，也是狭义上信息的概念。

Library and information science (LIS) (sometimes given as the plural library and information sciences) or as "library and information studies") is a merging of library science and information science. The joint term is associated with schools of library and information science (abbreviated to "SLIS"). In the last part of 1960s, schools of librarianship, which generally developed from professional training programs (not academic disciplines) to university institutions during the second half of the 20th century, began to add the term "information science" to their names. The first school to do this was at the University of Pittsburgh in 1964. More schools followed during the 1970s and 1980s, and by the 1990s almost all library schools in the USA had added information science to their names. Weaver Press: Although there are exceptions, similar developments have taken place in other parts of the world. In Denmark, for example, the 'Royal School of Librarianship' changed its English name to The Royal School of Library and Information Science in 1997. Exceptions include Tromsø, Norway, where the term documentation science is the preferred name of the field, France, where information science and communication studies form one interdiscipline, and Sweden, where the fields of Archival science, Library science and Museology have been integrated as Archival, Library and Museum studies.