The intelligent temperature and humidity controller adopts a variety of technologies such as microprocessor technology, sensor technology and computer. It uses a high-precision temperature and humidity sensor to measure the environment with high brightness LED display, and carry out comprehensive control according to different operating states. It is suitable for on-line monitoring of low and high temperature, automatic heating and dehumidification, low temperature automatic heating and high temperature automatic exhaust of terminal box, high and low voltage switchgear, transformer, prefabricated substation, circuit breaker and other equipments.