The utility model relates to a case humiture real -time monitoring system of substation equipment mechanism, including the host computer that links to each other with from the machine, from the seat in the plane in substation equipment mechanism incasement, the host computer is located outside the substation equipment mechanism case, draw together from the press packed bale: temperature and humidity sensor to and receive temperature and humidity sensor's temperature and humidity parameter and carry out the first control ware of the instruction of host computer, temperature and humidity sensor is connected with the first control ware, first control ware and host computer communication connection, the host computer includes: acquire from the temperature and humidity parameter of machine and to from quick -witted send instruction's the second controllor, the second controllor with from quick -witted communication connection. Be located incasement portion of substation equipment mechanism be responsible for gathering and conveying temperature/humidity information from the machine, the host computer that is located substation equipment mechanism case outside is responsible for receiving temperature/humidity information, the staff can know the humiture operating environment of incasement portion of mechanism through the host computer, need not one by one mechanism's case and goes to open and look over.