Modern information technology which is represented by intellectual technology is playing a more and more obvious roll on the revolution of library. It is very significant for the instruction of improving librarian's quality and the development of library industry to discuss the inter logic between information technology and the improvement of librarian's quality. The passage is based on the revolution that typical modern information technology brings to library industry. After including the improvement of librarian's quality caused by each period's revolution of library, the passage develop the logical model of the development of modern information technology linked with the improvement of librarian's quality. The exploration of the library intellectual technology theory, practical tendency and the direction of the improvement of new-generation librarian's quality are also mentioned in the passage.