The NAISIDA team provides services for the constant temperature and humidity control project of the Beijing Automotive University campus. The automobile school takes into account the indoor constant temperature in winter, cooling and dehumidification requirements in summer, and strict requirements on equipment operating costs. Our company conducts professional design and makes three sets of design options. The final customer adopted two sets of Nesda energy-saving gas-to-air heat exchange dehumidification unit 50000m³/H, and organized project construction, installation, adjustment, and passed customer acceptance. During the operation, the indoor environment temperature was controlled at 26℃ in summer and 18 in winter. ℃, the humidity is controlled at 55% for many years, and it has been calculated on site to reach the standard, and the comprehensive operation energy consumption and maintenance cost have been reduced by about 40% year-on-year.