The presented work is focused on the problem of construction and operation of unmanned machinery for field monitoring. The aim of this thesis is to build a functional model of quadcopter equipped with FPV camera, which is both large in size and performance enough to carry additional equipment for field monitoring. In the first chapter, the work describes the complete construction and informs us of the basic components needed for the successful quadcopter takeoff. We will get a basic knowledge of each component needed to successfully make bigger and smaller quadrocopters. The second chapter of the thesis contains a practical part describing the configuration of the flight control unit, the PID tuning and the general control of the quadcopter. The last part describes the quadcopter deficiencies that were identified during testing and proposed possible improvements.