The management of university libraries is becoming more and more dependent on digital change. This report uses data analysis techniques to examine how college libraries make decisions about digital transformation. The paper first examines how digital revolution affects college library management, including topics such as increasing service scope, streamlining resource allocation, and enhancing service efficiency. Second, real-world examples of data collection, cleansing, analysis, and visualisation are used to illustrate how data analysis is applied in digital transformation. Subsequently, an index system for evaluation is set up, encompassing many factors such as the creation of digital resources, service quality, user experience, and management effectiveness. Lastly, the impact of the digital transformation is assessed and confirmed through the use of empirical analysis techniques, offering a scientific foundation for decision-making in university libraries.