In a method for outputting programs of a workpiece placed on a scanner device using a computing device, three-dimensional (3D) point cloud data of the workpiece is received from the scanner device. The received 3D point cloud data is meshed into a plurality of triangles, and a 3D model of the workpiece is obtained. A measurement point on the 3D model selected, and coordinates of the measurement point on the 3D model is calculated. A measurement element is created according to the calculated coordinates. A preset virtual probe is imported to be displayed on a display screen, and the virtual probe is rotated according to a normal vector of the created measurement element. The method controls the virtual probe to move towards the created measurement element, and outputs programs of the created measurement element.