The invention discloses a control method for fan rotation speed of an air conditioner, wherein the control method comprises the following steps of: monitoring whether a moving heat source is in a room or not by utilizing a temperature detecting device on the air conditioner; when the moving heat source is detected to be in the room, monitoring whether moving people is in the room or not by utilizing an image acquiring device on the air conditioner; when moving people is monitored to be in the room, carrying out indoor image acquisition to extract facial features of the acquired image to obtain facial features which correspond to the acquired images, and enabling the obtained facial features to match with preset facial features; and when the obtained facial features are successfully matched with preset facial features, calculating a distance between people and an air outlet of the air conditioner according to the acquired images, and regulating rotation speed of a fan of the air conditioner according to the calculated distance. The invention further discloses the air conditioner. According to the technical scheme adopted by the invention, air feeding of the air conditioner is more intelligent.