An apparatus and method that uses at least six digital cameras to capture images of the foot, can reconstruct the 3D model of the foot rapidly. Users can only wear elastic socks, which have specially coded multicolored stripes or spots, and stands on the transparent plate of a platform. First from two parallel cameras under the transparent plate, the 3D contour about the sole of the foot can be computed and reconstructed through stereosis algorithm. Similarly, from the other four cameras at least around the upper part of the foot, four or more curved surfaces are combined to reconstruct 3D contour of the upper portion of the foot. Combining the bottom contours and upper contours of the foot the complete 3D foot model can be obtained.