The second half of17th century to18th century was the "enlightenment period" in Europe, and the capitalist productive forces continued to develop. Brand-new philosophy and emerging science strongly impact the church's complex philosophical worldview. Printing has also made progress. A library that only collects and preserves books can no longer meet the requirements of the times. It must organize and manage books systematically and scientifically. Scientists hope to turn the library into their research room and laboratory. Under the requirements of this era, library management has become more specialized, resulting in professionals who master book knowledge, as well as library science in the modern sense.

In addition to Nord, the pioneers of modern library science are German G.W. Leibniz, British J. Lipsius and J. Dury. Leibniz believes that the library is an encyclopedia of mankind; The progress of scientific research depends largely on how much information the library can provide. Under the guidance of its theory, the University Library of G? ttingen in Germany became a model of European university libraries at that time. Lipsey Uss is the author of On the Structure of Libraries. Li Du's book The Manager of the New Library has become the bud of library management thought.