The intelligent dehumidification device HND-CS adopts semiconductor refrigeration dehumidification method, actively sucking the humid air in the enclosed space into the dehumidification duct under the action of the fan. The water vapor in the air is condensed into water after passing through the semiconductor refrigeration mechanism, and then discharged out of the cabinet through the conduit, which can achieve good dehumidification effect. By reducing the moisture content in the air, both relative and absolute humidity can be lowered simultaneously, with almost no increase in temperature or negative effects caused by temperature differences. This fundamentally eliminates or reduces the occurrence of accidents, and does not accelerate the aging of cabinet components and cabinets due to high temperatures. The intelligent dehumidification device replaces the passive prevention of condensation with active guidance of condensation, effectively preventing safety hazards such as equipment aging, reduced insulation strength, secondary terminal breakdown, material mold, and steel structure corrosion inside the cabinet, ensuring the safe operation of the power grid.