Provided are a computer system and method using image analysis for controlling a flight path of a surface inspection unmanned aerial vehicle, wherein the computer system is configured to: acquire an image captured by a drone; perform image analysis on the acquired image; extract, in a result of the image analysis, a point whose an edge variation amount is equal to or greater than a predetermined threshold; acquire a position coordinate of the extracted point; in a case where there are a plurality of points, set a flight path of the drone in a manner of flying in an order of edge variation amounts of the plurality of points from large to small; and control the drone to fly towards the acquired position coordinate and perform capturing with a camera using light other than visible light.