Control method and control device for adjusting air volume of range hood

The invention discloses a control method and a control device for adjusting the air volume of a range hood. The control method includes the steps that the smoke concentration detection value is obtained, and the concentration difference D is determined according to the smoke concentration detection value and the preset reference value; a target gear of the range hood is determined according to theconcentration difference D; and the range hood is controlled to run at the target gear. By means of the embodiment, the smoke concentration detection value is obtained, the target gear of the range hood is obtained according to the concentration difference D, when a user conducts cooking, the concentration difference can be determined according to the obtained smoke concentration, and therefore the range hood can be automatically adjusted to the proper work power, and the work efficiency of the range hood can be improved. The operation of the user in cooking can also be simplified, time is saved, the double hands of