Abstract: A self-leveling ladder system constituting both a straight or a step ladder system which includes hydraulic cylinders which are attached to the bottom of each of the ladder frames. The hydraulic cylinders are interconnected by hydraulic pressure lines and filled with a hydraulic fluid. The hydraulic pressure lines each include an off and on valve. In an on position of the valve, the hydraulic fluid freely flows through the pressure lines and the hydraulic cylinders. When the ladder, straight or step, is placed on an uneven ground and the foot pads on the bottom of the ladder have reached their proper position with respect to a vertical position of the ladder, the ladder will attain a stable position when the valve is placed into an off position.