As a technical support,information and dissemination technology plays a very important role in modern libraries.

Investigation and analysis of agricultural condition information demand in China;

Classrooms——the main places to stimulate college students information demands;

An analysis of the information demand among Guangzhou area university students;

Analysis on the features of information needs from different farmers in the poor chinese rural community;

Literature citation patterns of postgraduates from School of Public Health of Sun Yet-Sen University and their information needs;

A discussion on information resources construction of academic libraries from the readers′ information needs;

Probing and innovating the consultation work in the academic libraries ——Based on the multiple-level research of users structure and information requirements;

Look upon our country s agricultural informationlization from the angle of information requirement;

The Financial Report Norm from the Increase of Information Requirements;

Representations of information needs in information retrieval and information filtering;

Taking the information need as the guidance,all levels of the government should try their best to develop the information service of countryside.

Combing with the property of the library,this essay tries to analyses the change of information need,types and information service quality.