A planar near field measurement method based on unmanned aerial vehicles (UAVs) is proposed to address the difficulty of precise measurement of ultra large ground antennas with apertures exceeding 10 meters due to their extremely high cost. Firstly, simulation analysis was conducted on the main factors that affect the antenna field measurement results, such as drone scattering, positioning accuracy, and measurement field selection. The measurement area was determined to use multi rotation drones and highprecision flight control technology. Under the condition of high-performance drones with the best 20 mm flight control accuracy and 5 mm measurement accuracy, the RF link design of the antenna field measurement system was carried out, and two near to far field data transformation methods were provided, they can effectively solve the problem of unreliable measurement results caused by poor positioning accuracy of drones in higher frequency bands. The effectiveness of the method was verified through case analysis, providing a good solution for low-cost and accurate measurement of ultra large ground antennas.