The intelligent dehumidification device adopts a semiconductor refrigeration dehumidification method, which actively sucks the moist air in the enclosed space into the dehumidification air duct under the action of a fan. The water vapor in the air condenses into water after passing through the semiconductor refrigeration mechanism, and is then discharged from the cabinet through a water conduit, achieving good dehumidification effect. By reducing the water content in the air, both relative humidity and absolute humidity decrease simultaneously, with almost no increase in temperature and no negative impact caused by temperature differences, accidents are fundamentally prevented or reduced, and the aging of components and cabinets inside the cabinet is not accelerated due to high temperatures. The intelligent dehumidification device has changed the passive prevention of condensation to active guidance of condensation, effectively preventing safety hazards such as aging of equipment inside the cabinet, reduced insulation strength, secondary terminal breakdown, material mold, and corrosion of steel structural components, ensuring the safe operation of the power grid. Leakage and flashover accidents caused by condensation inside the equipment generally occur in the following situations: firstly, the humidity in the area is high, the weather temperature changes greatly, the bottom of the switchgear is wet, and some cable trenches even have water accumulation; Secondly, some switchgear basements have high humidity, and the temperature inside the cabinet, especially near the ground, is lower than the ambient temperature; Thirdly, some equipment is temporarily shut down, and the temperature of the small environment inside the electrical cabinet is lower than that of the surrounding environment, which can easily form condensation on its surface. In this case, once the power supply is put into operation, accidents will occur. In order to ensure the safe operation of the power grid system and the long-term, safe and effective use of electrical equipment, the power system has put forward higher requirements for moisture and condensation prevention inside the cabinet.