Unmanned aerial vehicle (UAV) today play an increasing role in many public missions such as border surveillance, wildlife surveys, military training, weather monitoring, local law enforcement and so on. Due to its advantages such as low life-cycle costs and fewer restrictions on use, UAV has become important military weapon, then Counter-Unmanned Aerial Vehicle (CUAV) technology also become a research focus. Small drones that are not easily detectable have become an emerging threat. Low-cost and effective counter-UAV methods are explored for many countries. The CUAV technologies include traditional air defense weapon system, electronic warfare, UAV, laser weapons and so on. With the development of high-power lasers and continuous advances in beam control technology, CUAV laser weapons will become more practical.