In todays information age, how to effectively acquire knowledge is now a prerequisite for success in life. The conception and features of the knowledge service of university library are discussed firstly, and then the problems and development hindrances are also indicated on the basis of the network environment. Therefore, how to meet the requirement of the era becomes a challenge for the information service of university library. Some suggests are made to set up a scaffold in order to strengthen the information exchange and enhance the knowledge services level of university library by the application of the network communication tools.