An air control method and apparatus for cultivation comprising: the source of air (1), the air flow generator (3) and the air velocity retention device (AVRD)(5), wherein consist of the hollow airway (18) and the air outlet ventilator (19). To control air movement in areas where plants grow and to consistent air speed. To solve the problem of plant quality control to grow equally or similarly in all area. The air control apparatus is to create the source of air (1) motion with carbon dioxide and temperature control. Release the air to the air emission point that is working with the wing airplane principle. That cause of the air movement which carry carbon dioxide and temperature to the cropping area through the plant. And having the air velocity retention device (AVRD) (5) for keeping the speed constant throughout the area.