This Paper Based on the continuous development of new technologies such as big data and artificial intelligence, this paper analyzes the necessity of library user data management and classifies library user data, such as user profile data, user borrowing data, and user interaction data; Propose principles for data management development, such as the rule of law, value co creation, and cost-effectiveness. On this basis, explore various paths for library user data management in the era of digital intelligence, such as building a library user data management system, building a classified user database based on user profiles, and building a user communication platform,This provides reference for the construction of smart libraries.