A new type of double-control acousto-optic (A-O) Q-switched all solid state laser has been developed. A special home-made double-control driver, instead of a laser diode (LD) driver and an unattached A-O Q-switcher driver as used in the normal A-O Q-switched solid-state lasers, is used in the laser. In the double-control driver, both LD and the A-O Q-switcher work periodically at the same repetition rate as the output laser pulses. In each period, LD lights in advance of the time of the output laser pulse occurrence and quenches behind the laser pulse. At the same period, A-O Q-switcher starts working before LD and stops working behind LD. The new type of solid state infrared laser has much better performance in compare with the normal A-O Q-switched solid-state lasers at the same repetition rates: electric power saving more than 50%, temperature rising at main parts of the laser set dropping down with more than 10 ℃, time taken for thermally stable state being reduced to 23%. Pumped by a 1 W LD, the non-spurious output pulses with peak power of about 4 kW and width of 16.8 ns are obtained.