The invention relates to a civil air conditioner system, in particular to an artificial intelligence (AI) air conditioner system achieving real-time closed-loop control through high-sensitivity thermohygrometers. The high-sensitivity thermohygrometers distributed in all relatively-closed spaces of a building are adopted as main sensors, and through a router and the Internet of Things and accordingto the atmospheric temperatures in different time periods, the instant temperatures and humidity in all rooms, the personnel activity situation and the electricity price in the current time period, AI air conditioner indoor units, AI dehumidifying and humidifying machines and an AI air inlet and exhaust fan are controlled coordinately in a closed-loop mode to automatically maintain the temperature and humidity of the personnel activity space in the optimum range and maintain the temperature and humidity of the temporarily unmanned activity space in an energy-saving state for guest waiting; the temperatures and humidity of halls and the rooms with special needs can be adjusted and controlled through voice, and the AI air conditioner indoor units can understand commands in multiple languages and reply the command executing situations in the same language; and through the AI air conditioner system, the user using experience of the air conditioner system can be obviously improved, the selective assembly power of an air conditioner outdoor unit is obviously reduced, and investment, energy consumption and the electricity charge of the whole air conditioner system are obviously reduced.