Abstract: An alarm light device comprises a casing seat having a power wire passing through a lower side thereof; a base installed on the casing seat; a bottom of the base being installed with a motor; a rotary shaft of the motor passing through the base to be protruded from an upper side of the base; a driven gear installed around the rotary shaft and a driven gear being installed in the case and being engaged to the driving gear; a rotary seat being installed on the driven gear; at least one reflector cambered mirror being installed on the rotary shaft; a center portion of the rotary seat having a through hole; a lamp seat installed in the through hole; at least one first strong power source being installed in the lamp seat; and a cover covering upon the base so as to form an alarm light.