In this paper, we propose an architecture and a scheme for a smart hospital based on the Internet of Things (IOT) in order to overcome the disadvantages of the present hospital information system, such as the fixed information point, inflexible networking mode and so on. The key technologies and construction of smart hospitals is presented based on an understanding of the connotation and architecture of smart hospitals. Furthermore, taking a third grade-A hospital as an example, a scheme for a smart hospital is given, and its logic structure, application framework, the construction of a basic network environment etc. are described in detail. The experiment proves that the deployment of smart hospitals can effectively solve the prominent problems of diagnosis and treatment in hospitals and it brings about a positive and profound effect for the present diagnosis and treatment mode in hospitals.