This research is about controlling the altitude of the Unmanned Ariel Vehicle (UAV) through the elevator. Elevators are flight control surfaces, which control lateral altitude by changing the pitch balance. The elevators are usually hinged to a fixed or adjustable rear surface, making as a whole, a tailplane or horizontal stabilizer. The elevator is used to control the altitude by its movement which gives lift to the UAV. It consists of two loops: an inner-loop controller to achieve stability and robustness to expected parameter uncertainty and an outer loop for tracking reference performances. In the past, people have done work on its longitudinal maneuver using elevator control input and in this research, we are going to control vertical height using elevator control input of the Unmanned Ariel Vehicle. This work eyes on altitude maintenance of UAV through a dual laser and ultra-sonic deflection, for graphing the surrounding and maintaining the minimum maintained altitude. The angle deflection along with the thrust from propulsion system is matched and guided by the system for the gain or loss of altitude over desired range of distance. The significance of the system would be efficient increase and decrease of altitude of UAV along with easier piloted drone; and in military aspects the stealth enhancements for low chances of being detected. The expected result increases efficiency of any Unmanned Aerial Vehicle along with low fuel consumption because of achieving desired altitude over short range.