The emergence of Artificial General Intelligence(AGI) has brought development opportunities to library knowledge services. The application of AGI in the field of library knowledge services can not only upgrade traditional services such as reference consultation and intelligence customization but also realize innovative services in professional support and multimodal integration. The framework of library knowledge services based on AGI mainly includes three layers: interactive collaboration, knowledge service, and environmental support, as well as five implementation stages: service planning, service design, service implementation, service provision, and service improvement.