It is Based on the analysis above mentioned, Digital Library must change its service mode to meet to reader’s need for digital resources. On the one hand, digital library should improve its services quality to attract readers although the number of reader accessing to library is decreasing. On the other hand, digital library should take various of advanced technology to attract both information searching corporate and digital book publisher in order to extend its influence fields. The relationship of cooperator, reader and digital library as show Figure 1.