Through the establishment of Airpak software and the 1:1 physical model of the climate cabin for numerical simulation, the simulation data is used to design the environmental climate cabin of the northern indoor geothermal heating method. The geothermal heating environment climate cabin has been developed, and 2 invention patents have been applied for.    The research team carried out 96 hours of formaldehyde and TVOC cabin upper port and lower port pollution concentration detection at three temperatures of 22 ℃, 26 ℃ and 30 ℃, and plotted the pollutant concentration curve.    Under geothermal heating conditions, when the cabin temperature is 22℃, 26℃, and 30℃, the velocity distribution at the inner axis of the climate cabin shows the same trend. When the temperature rises to 30℃, the axis of the climate cabin. The air velocity is the highest. The temperature gradient of the airflow at the axis is not obvious. The temperature near the floor is high, and the temperature in the vertical direction of the entire cabin is relatively uniform. The temperature difference in the cabin mainly depends on the heat transfer between gas molecules. When the temperature is 22℃, the formaldehyde concentration in the cabin does not fluctuate much. When the temperature in the cabin is 26℃ and 30℃, the concentration of formaldehyde fluctuates greatly. When the temperature is 30°C, the concentration of formaldehyde measured at the sampling port at the upper end of the chamber is higher than that at the sampling port at the lower end, and the concentration levels of formaldehyde at the two sampling points are quite different.     Based on the environmental climate chamber test method under the geothermal heating mode, it conforms to the actual situation, and the detected value is close to the true value. This result is of great significance for guiding the reduction of indoor pollutants and building a livable environment.