The scene-based service is the need of the library to adapt to the development of the new era, which reflects the library's emphasis on the user experience and the improvement of the service environment and quality. This paper combines relevant research, expounds related concepts and connotations, and analyzes the scene-based service requirements from the three dimensions of reader, library and knowledge. Based on this, the article analyzes the construction process of context awareness model from context data collection, context calculation, context modeling and model evaluation, and builds the framework of the smart library scene-based service system focuses on users, which consists of context awareness module, resource integration module, technical support module and scene service module, and discussed the problems and countermeasures.