Broadly speaking, information and library are integrated and inseparable. The quality of medical information service is closely related to the construction and management of medical libraries. Although the service objects and books in medical libraries have their own professional particularity, they are similar to the establishment, scientific management and consulting services of ordinary libraries.

The situation of medical information service varies from country to country.

Or there is no specialized medical intelligence agency managed by the medical library: for example, the National Library of Medicine, the Regional Center Medical Library and the Medical College Library in the United States; The National Library of Australia provides medical information services. Or there are separate institutions: for example, Germany has the Cologne German Institute of Medical Literature and Information, the Bierfield Institute of Social Medicine and the Public Health Literature and Information Institute; Japan has International Medical Information Center, Japan Medical Information System Development Center and Japan Medical Information Center (mainly pharmaceutical journal abstracts). However, the work of these institutions belongs to the category of medical library+computerization+networking or doing some abstract work, that is to say, the work of computer retrieval consultation belongs to the work of modern medical libraries. Or there may be specialized medical intelligence agencies: for example, the Soviet Union has the All-Soviet Institute of Medical and Medical Technology Information, the Academy of Medical Sciences, and the medical intelligence departments of all participating countries, universities and states. China has the Institute of Medical Information of Chinese Academy of Medical Sciences in Beijing; All provinces, cities and regions also have medical information stations (stations), which either exist independently or belong to the regional academy of medical sciences; Hospitals and research institutes also have information rooms, which specialize in medical information services. Local medical libraries (rooms) are either independent institutions or affiliated to medical information stations (stations).