Along with the application of information technology gradually increased in the library, libraries� digitization and information are becoming more and more mature. Therefore, the management of digital library needs to change ideas, realizes the modernization and science of management to promote digital library to be scientifically efficient operation. Firstly, this paper expounds on the concept of digital library, and summarizes the characteristics of the digital library. What�s more, it further analyzes the digital library�s management innovation under the informatization background. On this basis, the theory combines with practice. It applies mathematics model to construct the scientific management model of the digital library. And through the model analysis, it puts forward some suggestions and practical measures for scientific management of the digital library. To some extent, it provides a new active exploration path for the research of this field.