Security unmanned aerial vehicle with good expansibility and security system thereof

The invention discloses a security unmanned aerial vehicle with good expansibility and a security system thereof, and the system can plan a range and a path which need to be monitored through the matching of a plurality of unmanned aerial vehicle bodies with the security system, and carries out the monitoring of an area through all monitors at the same time. The accuracy of the path of the unmanned aerial vehicle body in flight can be guaranteed through the path planning module and the obstacle avoidance module, the monitoring range is covered through the multiple unmanned aerial vehicle bodies, the problem of dead angles is avoided, and when the electric quantity of a certain unmanned aerial vehicle body is lower than a threshold value, the unmanned aerial vehicle body is protected. Through mutual cooperation of the unmanned aerial vehicle controller, the electric quantity monitoring module and the wireless charging module, the unmanned aerial vehicle body with the electric quantity lower than the electric q