Digital intelligence drive is a powerful engine to break the shackles of library intelligence operation and boost its sustainable development. Based on the existing research, we explored the development characteristics of smart libraries under the digital intelligence drive, and clearly explained the five comprehensive application scenarios of health services, emergency management, digital humanities, smart city, and knowledge services based on the four-dimensional framework of agility, wholeness, traversal, and technology and humanities. Based on infrastructure, data management, technology analysis, and service application, we built a model architecture of smart libraries around the origin of digital intelligence, and proposed systematic protection strategies for the improvement of smart librarians' literacy, the shaping of standard system, the integration of good governance model, and the introduction of multiple cooperation mechanisms, which jointly drive the high quality operation of smart libraries.