Includes an aircraft including a main body; The aircraft control system is installed on the main engine; The rotor mounting frame is replaceably sleeved on the main machine body; A plurality of rotor power arms are selectively installed on the rotor mounting frame; The functional cabin is replaceably installed below the main body; The landing gear is connected with the function pod. It is a kind of unmanned aerial vehicle, which has the advantages of small size, light weight and high efficiency.