1. A 3D AF camera module comprising: a first imaging unit for capturing an image of an object from a first angle; a second imaging unit for capturing another image of the object from a second angle different from the first angle; a storage unit for storing the images captured by the first imaging unit and the second imaging unit; a color separation unit for separating the images captured by the first imaging unit and the second imaging unit into red, green and blue colors; a main processor unit electrically connected to the color separation unit, the main processor unit being configured for calculating MTF values of the images and determining a shooting mode of the 3D AF camera module, wherein the shooting mode comprises a close shooting mode and a long shooting mode; an image processing unit electrically connected to the main processor unit and the storage unit, the image processing unit processing the images according to the MTF values calculated by the main processor unit to compensate blurs of each of the images caused by out of focus when the long shooting mode is selected, the storage unit configured for storing the processed images processed by the image processing unit; a first driving unit connected to the main processor unit, the first driving unit driving the first imaging unit to an optimum focusing position according to the MTF values calculated by the main processor unit when the close shooting mode is selected; a second driving unit connected to the main processor unit, the second driving unit driving the second imaging unit to another optimum focusing position according to the MTF values calculated by the main processor unit when the close shooting mode is selected, the storage unit configured for storing images captured by the first and second imaging units in the optimum focusing positions; and an image combining unit electrically connected to the storage unit and configured for combining the processed images processed by the image processing unit to generate a 3D image or combining the images captured by the first and second imaging units in the optimum focusing positions to generate a 3D image.