High temperature, humidity and salt fog answer for most corrosion on airborne equipments deployed near coastline. Maintenance methods at present time are subjective and inefficient. Constructing distributed Realtime temperature and humidity monitoring system is important for scientific maintenance. After comparing several types of airport monitoring systems, considering distribution of air crafts and special restriction on sensor cable, new monitoring system based on WSN was brought forward. With the assistance of NIWSN products, the new system could merge wireless and wired network and was applicable to airports with various scale and form under various climatic conditions. It has the advantages of low energy consumption, less wire layout, strong software and hardware expandability. It can provides quantitative reference for accurate moistureproof maintenance work. It has an important significance to achieve the required maintenance and the airborne equipment intact rate.