The utility model discloses an air current detection device, the air current of being applied to the dust free chamber detects, a serial communication port, include: the mobilizable body that is the rectangle form, the elevating system of height -adjustable festival, set up in on the body, the wind speed detecting head, set up in elevating system's top, promote the unit, with elevating system connects, is used for controlling elevating system rises or descends, makes the wind speed detecting head reach predetermine highly right the dust free chamber carries out the air current and detects. Its technical scheme's beneficial effect lies in, can replace artifical handheld wind speed measuring apparatu to carry out the wind speed through elevating system and measure, make detect operation safety more, has improved detect operation's efficiency simultaneously, has improved the measuring accuracy.