Abstract: China's medical information construction, driven by the development of information technology and the guidance of national policies, has entered the stage of smart healthcare. Hospitals at all levels are actively engaging in this construction, and therefore need to seize the opportunity and explore the development path of smart healthcare. This paper proposes a multilevel interconnected smart healthcare system, introduces its design idea, key points and application modes, to form a closed loop of integrated medical support services and achieve the intelligent transformation of the medical support model.