A venting system for a stove includes a screen disposed beneath a bottom opening of the stove and an elevation means for adjusting a height of the screen so as to enable the screen to selectively move close to or away from the bottom opening. More specifically, the elevation means includes a main body and an adjuster, and the screen includes an elevator. The main body has a fixation portion and a connecting portion. The fixation portion is fixed to a bottom of the stove, and the adjuster is movably connected to the connecting portion. The elevator and the adjuster are in a motional operative relationship. As such, the elevator can be elevated, by the adjuster to selectively move close to or away from the bottom opening.