The quad-axis aerocraft is one of the micro-aerocraft, and it is also a kind of intelligent robot. It was first made by aviation model enthusiasts, and then it was very good. More automation manufacturers find it can be used for a variety of utility and active in development. It USES four rotor as an engine for air flight, flight of its smaller size, lighter weight, suitable for carrying and use of unmanned aerial vehicle capable of carrying a certain task load, autonomous navigation flight ability. In a complex and dangerous environment specific flight mission.