1. A 3D model reconstruction acquisition comprising steps of: preparing a transparent container and at least one image capture device, wherein the image capture device is spaced from the transparent container, the transparent container has a cylindrical appearance and a geometric cross-section, and the transparent container receives an object and a liquid therein; keeping the liquid level rising or lowering to allow the liquid level to pass through the surface of the object and then keeping capturing a series of images of the liquid level by an image capture device every predetermined duration; computing a liquid-level equation for each of the images by using curves of the images between the object and the incremental or decremental liquid level confined by the transparent container; computing 3D coordinates of the curves in accordance with the liquid-level equation of each image; and collecting the 3D coordinates of the curves to create a 3D model of the object.