With the development of the Internet of Things technology, a ward environment monitoring system has been designed to improve the medical treatment and hospitalization environment of people, and reduce the burden of medical staff. The system uses STM32F10C8T6 to control communication modules, temperature and humidity sensor modules, digital light intensity modules and other devices to achieve real-time monitoring of ward environment information. Through Tmall Genie, voice information is recognized to control equipment such as fans, curtains, and lighting in the ward to improve the environment. Patients can also log in to the mobile APP to achieve environmental monitoring and control. The system design is simple and complete, solves the pain points of real-life problems, and achieves greater resource utilization, with broad development prospects.