The utility model discloses become the phenomenon of ubiquitous condensation to the case that uses in the electric wire netting, provide a case becomes air cycle cooling dehumidification system. The utility model provides a technical scheme that its technical problem adopted is: a case becomes air cycle cooling dehumidification system, includes: automatic control dehydrating unit, hand held mobileterminal, data basic station and administrative center, automatic control dehydrating unit includes controller and dehumidifier, the dehumidifier is connected with the controller, the controller includes first control circuit and a ACDC isolated power supply module, temperature and humidity sensor circuit, radio frequency transceiving integrated circuit, dot -matrix LCD module and relay, the datathat come from the controller are received to hand held mobile terminal and data basic station to to the controller control with the parameter setting, carry out the data interaction between hand held mobile terminal and the data basic station.