The production of electronic equipment has strict requirements for environmental temperature and humidity conditions. The temperature and humidity field inspection instrument is widely used in electronic equipment production workshops. It can detect the temperature and humidity distribution in the workshop to ensure that each production link is carried out in a suitable temperature and humidity environment. In high-precision production processes such as chip manufacturing, excessive humidity may cause problems such as short circuits, and unstable temperature will also affect the performance of electronic components. The inspection instrument can timely detect abnormal points of temperature and humidity, which is convenient for the staff to adjust the production environment parameters in time, improve the product yield, and reduce the production cost.