The aircraft will use air conditioners to control the temperature, so that the temperature in the cabin will not be particularly low; and the rocket needs to pass through the same height safely.

The air-conditioning system​ ensures a constant supply of fresh air and maintains a constant selected temperature in the three areas of the cockpit, front cabin and rear cabin, mainly by conditioning the air entering the interior of the cabin. The air entering the cabin is regulated by mixing cold air and bleed air to the right temperature.

During the development of China's civil aviation, the A320 aircraft air-conditioning system frequently broke down, and the failures were repeated and complicated, which brought great inconvenience to the flight crew. In the survey results of China's major airlines, it was found that the number of aircraft air-conditioning system failures has almost reached half of the total number.