With the development of science and technology, the requirements of production and life for the stability and safety of power supply are increasing. The distribution rooms are scattered, the equipment models in each distribution room are not unified, and the intelligence of most power transformation and distribution is low. In order to ensure the long-term safe and stable operation of power supply equipment under the current limited human and material resources of operation and maintenance, At present, the traditional operation and maintenance mode of power supply equipment is to reduce the occurrence of sudden faults by investing a lot of manpower in regular inspection. Under the pressure of increasing manpower cost year by year, the personnel are continuously downsized, the allocation of high-quality operation and maintenance personnel is not in place, and the low-level operation and maintenance personnel are idle. The lack of ability and manpower waste coexist at the same time, and the safety inspection work is relatively weak, Manual patrol inspection can only see the appearance of equipment operation, and cannot see through the equipment operation data and judge the equipment operation status. The operation data records of equipment under traditional manual patrol inspection are incomplete, the data types are incomplete, the coverage is insufficient, and the dispersion is large. It is impossible to find the potential faults of equipment in advance, and identify and locate the faults at the first time, The reliability of end use electricity is greatly reduced. Therefore, the "intelligent remote monitoring intelligent dehumidification system" based on the Internet of things + wireless condensation dehumidification device of switch cabinet is introduced to monitor the environmental system of distribution cabinet for 24 hours by means of monitoring and data analysis technology through comprehensive data collection and storage. Improve and realize big data, visual and intelligent operation and control of electric equipment.