Abstract: Cloud computing has attracted extensive attention in the field of library science as soon as it was put forward. The introduction of cloud computing mode in library can efficiently improve service quality. In this paper, the existing problems in traditional library service were analyzed. Then theoretical foundation of library’s cloud service was introduced. On this basis, the feasibility and advantages of applying cloud service in digital library were discussed. Construction of digital library’s cloud service on the side of library, cyber cloud and user was suggested. Finally its implementation path was studied based on iceberg principle. This service mode integrated many kinds of other service based on user's demands. It gradually demonstrated its own advantages in library service and facilitated library service to develop in a creative way.

Key words: digital library