Since the CORONA pandemic, hospitals have been under increasing pressure to achieve a real-time remotely treated health system, but they face interoperability problems surrounding different health information systems. Traditional methods have become less able to update in time and deal with the volume of big data. There is a need to seek a more coordinated, integrated, and comprehensive approach to digital transformation - an approach that brings systems together and considers impacts from all perspectives- such as the Digital Twin (DT) approach which is supported by a range of technologies, the Internet of Things and artificial intelligence. It is a technique that has demonstrated its ability to provide a viable way to resolve these growing challenges. As digital twins (DT) have evolved dramatically over the past years, there is still considerable confusion about what digital twins are/ aren't? And whether he will keep his promises like many new technologies. This research paper to remove this confusion and answer what is a digital twin? How it works and what are the benefits of using it in architecture, building management. With the presentation of a successful experience of a hospital based on digital twins (DT) in the management of dynamic data of different systems.