1. An accuracy compensation method executable by at least one processor of a computing device, the method comprising: obtaining an image of a product from an image source, wherein the image source comprises an image capture device which communicates with the computing device wirelessly, a storage device in the computing device, and a database which is connected to the computing device via a network; recognizing an actual outline of the product according to the image of the product, and determining coordinates of points of the actual outline; obtaining an ideal outline of the product from a CAD model of the product; aligning the actual outline and the ideal outline of the product, and computing minimum distances from each of the points of the actual outline to the ideal outline; determining points on the ideal outline, each of which corresponds to one of the points on the actual outline, according to the minimum distances, and obtaining coordinates of the points on the ideal outline; computing coordinate differences between each of the points of the actual outline and each of the corresponding points on the ideal outline; assigning compensation values of the points on the ideal outline based on the coordinate differences; obtaining a control program from a storage medium, wherein the storage medium comprises the storage device in the computing device and a storage device in a control device which is connected to the computing device, controlling a computer numerically controlled (CNC) machine to produce the product using the control program, and obtaining a measurement path of a cutting tool of the CNC machine according to the control program; determining points on the measurement path corresponding to the points on the ideal outline; generating a compensated measurement path by compensating the points on the measurement path using the compensation values; and correcting the control program according to the compensated measurement path.