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With the goal of building a modular, intelligent and precise ward temperature control system, this paper conducts a specific study on the existing temperature control systems of some tertiary hospitals, analyzes their existing problems, and proposes and designs a An intelligent ward temperature control system based on STC single-chip microcomputer; the system uses the PC terminal system as the upper computer terminal, the single-chip hardware system as the lower computer terminal, the STC89C51 as the single-chip main control plate, the temperature and humidity measurement using DHT11 sensor, indoor CO2 concentration using T6713 -5K sensor measurement, and transmit the data to the single-chip microcomputer through the interface, the temperature and humidity and CO2 concentration and other information are displayed on the LCD1602 display screen, and at the same time, the PID algorithm parameters are adjusted to realize the room temperature adjustment. and CO2 concentration threshold for early warning; through experimental tests, the system realizes effective control of ward temperature and humidity and visualization of ward environmental data; through practical application, it meets the requirements of intelligent control of temperature and humidity in some hospital wards, keeping the temperature and humidity at 20 ℃ Between -25°C and 40%RH-55%RH.