The Micro-Moisture Density Monitoring System consists of a micro-moisture density monitoring unit, a centralized acquisition monitoring display integrated machine, and a backend monitoring system. The monitoring unit is used for on-site data sensing and transmission at specific regional points. The centralized acquisition monitoring integrated machine collects data from each monitoring unit via wired RS485 communication and employs a color LCD display with clear text, showing parameters such as the temperature and humidity inside the on-site switchgear gas chamber, as well as gas pressure, temperature, relative humidity, density, dew point temperature, and micro-moisture volume fraction at monitoring points. The display is intuitive and easy to read, and data communication with the backend is achieved through RS485.