An electronic device for creating a three-dimensional image includes a number of image capturing units, an outline detecting unit, a coordinate determining unit, and an image synthesizing unit. Each image capturing unit captures an object located in one corresponding direction of a three-dimensional scene with different focal length and then captures a number of images of the object in each direction. The outline detecting unit detects an outline of the object in each captured image. The coordinate determining unit determines three-dimensional coordinates of each point on the detected outline. The image synthesizing unit synthesizes the detected outlines of objects from the captured images captured in the same direction together according to the three-dimensional coordinates of the outlines, creates a three-dimensional image along each direction with the corresponding synthesized outlines, and stitches the three-dimensional images of different directions together to obtain a combined image.