A system and method measures digital images of a workpiece using a measuring computer and a client computer. The measuring computer reads each of the digital images of the workpiece from a source file, and merges all the images to generate a combined image of the workpiece. An object to be measured is selected from the combined image, and an image of the selected object is extracted from the combined image. The client computer measures the selected object on the extracted image, and displays measuring results of the selected object.