1. A 3D photo creation system, comprising: (a) a stereo image input module configurated to input a stereo image; wherein the stereo image comprises a left eye image and a right eye image; (b) a depth estimation module configurated to estimate a depth information of the stereo image and create a depthmap; (c) a multi-view angle image reconstructing module configurated to create a set of multi-view angle images comprising a plurality of images having different disparities according to the depthmap and the stereo image; and (d) an image spaced scanning module configurated to adjust the set of multi-view angle images and form a mixed image; wherein the depth estimation module comprising: (b1) a pixel matching module configurated to compare the left eye image and the right eye image of the stereo image and find a matching pixel between the left eye image and the right eye image, and find an optical flow of the pixel according to an optical flow constraint formula; (b2) a depth information confirmation module configurated to find a pixel shifting according to the optical flow of the left eye image and the right eye image to confirm the depth information of the pixel; and (b3) a depthmap creation module configurated to create the depthmap according to the depth information; wherein a scale of the mixed image is adjusted and the scale is calculated by an equation 
 Width actual =LPI ideal /LPI actual ×Width ideal where the LPI ideal is a line per inch of a lenticular lens at an ideal situation, the LPI actual is an actual line per inch of the lenticular lens; the Width ideal is an ideal width of the lenticular lens, and the Width actual is an actual width of the lenticular lens.