The on-site equipment management personnel accompanied the whole process. First, they understood the customer's basic dehumidification requirements. The customer first proposed the dehumidification requirements for key areas, that is, local dehumidification for environmental areas. I measured the specific area and height of key dehumidification areas. The dehumidification area is connected with the whole space without any shelter, so the safety factor should be larger when calculating the dehumidification amount of the dehumidification area.