In the information times, the university librarians, who want to become the qualified information navigators and meet the needs of the social development in the information times, must continuously learn the new knowledge and new techniques, improve the quality of themselves.

This text writes that universities library demands urgently to train the information navigator.

This paper briefly introduces the relation between the knowledge eco nomy and the literature information, expounds the new requirements of the knowle dge economy era on the librarians, and puts forward the qualities that the libra rian should possess being as the qualified information navigator.

The paper expatiates the concepts and characteristics of invisible web,expatiates the reason of its forming in the information navigation system.

The content analysis based on information resources appentds knowledge to information navigation,and makes information navigation intelligent.

The category of the construction of literature resources of information navigation database for key disciplines in colleges and universities mainly includes information service in the worldwide web and the digitalization & virtualization of the number of books collected in the library.

This paper proposes an accurate orbit determination technique to accurately determine orbit elements of a spacecraft equipped with a GPS receiver according to navigation messages from the receiver.

The professional nature of the future academic library:information guider;