Abstract: In drilling control method and apparatus for making holes through a composite workpiece made of a plurality of materials having different machining properties, the workpiece is first drilled at a feed speed and a rotational speed of a drill which are selected. When the drilling of the workpiece is initiated, the amounts of the feeding speed and the rotational speed are detected by a feed speed sensor and a rotational speed sensor, respectively, and thrust force applied to the drill during the drilling is also detected by a thrust sensor. The detected feed speed and the rotational speed of the drill are compared in a comparison unit with optimum values which are adapted to the detected thrust force.