The primary intent has been to establish a strong technical base necessary for the development of the ornithopter as an alternative to the helicopter. the helicopter is best suited for hovering flight and suffers greatly reduced efficiency as forward speed is increased. on the other hand, the ornithopter can achieve hovering flight, albeit with much more mechanical complexity, but promises high efficiency in forward flight. the method of attack for this study of the ornithopter has been to depart gradually from the conventional aircraft configuration so that the large body of knowledge accumulated in the development of the airplane could be applied to the study of the ornithopter. in future we are going to be used drones for security and surveillance purpose. but the main idea is that to make the concept of bi-wing flapping mechanism which can be used for surveillance and security purpose. the advantage of bi- wing mechanism is that over the drone is that it will fly like a bird so human can’t able to detect easily but the drones can easily detect by humans.