It is not easy to control humidity in geomagnetic room and it will lead to abnormal change on the data if humidity is too high or the change is too fast． The system of intelligent realtime analysis monitoring system of geomagnetic station and probe humidity will not only monitor and show the change of humidity in the geomagnetic room and ring the bell if it exceeds the set range，but also dehumidify the room intelligently． You can control the probe arbitrarily to observe environmental humidity in order to ensure the data stable and true． The design idea and main functions of the system is introduced．