| A positioning and measuring system comprises: an image scale supporting an object and having positioning mark sets and encoding pattern sets arranged in a two-dimensional array, each positioning mark set comprising positioning marks, each encoding pattern set comprising encoding patterns disposed in gaps between the positioning marks; an image capturing device capturing measurement points of the object and the image scale to obtain composite images; a processor processing the composite images, and determining a position relationship between the measurement points according to the encoding patterns and the positioning marks; and a driving mechanism electrically connected to the processor and mechanically connected to the image capturing device or the image scale to drive one of the image capturing device and the image scale to move relatively to the other of the image capturing device and the image scale. |