[Problem] To provide a drone flight control system which makes it possible to improve the efficiency of pest control using a drone. [Solution] This drone flight control system 1 is provided with: a distance measurement module 101 for measuring the distance between a pest control device 20 or a drone 10 and an object; a flight altitude control module 102 for controlling the flight altitude of the drone 10 so that the measured distance satisfies a predetermined condition; an insect sensor 15 for detecting insects killed by the pest control device 20 or insects gathering around the pest control device 20; and a flight speed control module 103 for controlling the flight speed and flight direction of the drone 10 according to the result of detection by the insect sensor 15 so that the predetermined condition is satisfied.
