The controller adopts multiple advanced technologies, including microprocessor technology, sensor technology, and computer systems. It employs high-precision temperature and humidity sensors to measure environmental conditions with high-brightness LED displays for comprehensive control based on operational status. The device is designed for monitoring and regulating temperature and humidity, particularly suitable for online monitoring and automatic heating/dehumidification applications in terminal boxes, high/low-voltage switchgear, transformers, compact substations, circuit breakers, and other equipment requiring protection against moisture, low temperatures, and high temperatures.