The invention aims at disclosing an air power generation device and an application thereof, which belong to the air power generation type and are widely used in industry, agriculture, civil use, mechanical equipment and various fields in the industry of motor vehicles. The air power generation device can truly realize energy conservation, emission reduction and environmental protection; furthermore, air is inexhaustible energy regardless of daytime, night, sunny days and rainy days. The adoption of the air power generation device and the application thereof is in line with the industry development direction of human beings, and can benefit the society for energy conservation and emission reduction. The air power generation device and the application thereof are characterized in that the air power generation device consists of a generator 1, a rectification, transformation and charging device 2, a motor 3, an air compressor 4, an air transmission pipeline 5, an airflow valve 6, a pneumatic motor and transmission 7 and a battery jar 8, wherein the generator 1 transmits power to a circuit 9 of the rectification, transformation and charging device 2, the rectification, transformation and charging device 2 transmits the power to the circuit 10 of the motor 3, the rectification, transformation and charging device 2 transmits the power to the circuit 11 of the battery jar 8, and the battery jar 8 transmits the power to the circuit 12 of the motor 3.