Taken the reader identification of University libraries as classification basis, which were divided as four different types of users, that is instructors, doctorial students, graduate students, and undergraduate students, reading library holdings and resources utilization ratio of digital library were tested in this study. Based on the universal introduced LibQual+TM scale in foreign university library, the questionnaire was surveyed by combining with characteristics of Northeast Forestry University Library. According to a variety of users, the difference were analyzed on frequency of utilization, reasons for use, the importance on service quality of library and satisfaction evaluation, which was offered theoretical reference of resource allocation and service idea for future university library.