In this paper, we work to achieve a robot which is capable of climbing vertical walls with the aid of passive cups using suction force. The passive mechanism is so simple. Also the system does not require more energy to climb the wall or stay on the wall making the system very attractive. Also the ability to stay in the wall without any hindrance makes it more efficient. The strong attractive adhesion on the wall can be broke by pulling it out and until then it remains on the surface. Our robot is 14cm tall and 35 g in weight. It has three degree of freedom. It can travel with a velocity of 3m/s and climb at a velocity of 2m/s.