An inspection method comprising: using X-rays to scan an examining target for generating a scanned image, wherein the step of using the X-rays to scan the examining target for generating the scanned image is performed by using a scanning device utilizing a line scan camera or a flat panel camera, the scanning device comprising an X-ray generator and an X-ray detector, wherein the X-ray generator generates the X-rays, the examining target is arranged between the X-ray generator and the X-ray detector, the X-ray detector detects the X-rays outputted from the X-ray generator through the examining target, the X-rays passing through the examining target are photographed as an X-ray image by the X-ray detector, and the X-ray detector is a line scan camera or a flat panel camera; reconstructing the scanned image for a reconstructed volume (220, 240, 420, 440, 520, 620); determining a slicing direction associated with the examining target for slicing the reconstructed volume (220, 240, 420, 440, 520, 620) into a sliced image (224, 244, 320, 340, 424, 444, 522A-522C, 640, 660); inspecting the sliced image (224, 244, 320, 340, 424, 444, 522A-522C, 640, 660) for analyzing one or more features of the examining target; and outputting an inspection result of the examining target, wherein the step of inspecting the sliced image (224, 244, 320, 340, 424, 444, 522A-522C, 640, 660) and outputting the inspection result of the examining target comprises: analyzing a symmetry of the examining target in the sliced image (224, 244, 320, 340, 424, 444, 522A-522C, 640, 660); and outputting an abnormal result when the symmetry of the sliced image is under a predetermined threshold value. using X-rays to scan an examining target for generating a scanned image, wherein the step of using the X-rays to scan the examining target for generating the scanned image is performed by using a scanning device utilizing a line scan camera or a flat panel camera, the scanning device comprising an X-ray generator and an X-ray detector, wherein the X-ray generator generates the X-rays, the examining target is arranged between the X-ray generator and the X-ray detector, the X-ray detector detects the X-rays outputted from the X-ray generator through the examining target, the X-rays passing through the examining target are photographed as an X-ray image by the X-ray detector, and the X-ray detector is a line scan camera or a flat panel camera; reconstructing the scanned image for a reconstructed volume (220, 240, 420, 440, 520, 620); determining a slicing direction associated with the examining target for slicing the reconstructed volume (220, 240, 420, 440, 520, 620) into a sliced image (224, 244, 320, 340, 424, 444, 522A-522C, 640, 660); inspecting the sliced image (224, 244, 320, 340, 424, 444, 522A-522C, 640, 660) for analyzing one or more features of the examining target; and outputting an inspection result of the examining target, wherein the step of inspecting the sliced image (224, 244, 320, 340, 424, 444, 522A-522C, 640, 660) and outputting the inspection result of the examining target comprises: analyzing a symmetry of the examining target in the sliced image (224, 244, 320, 340, 424, 444, 522A-522C, 640, 660); and outputting an abnormal result when the symmetry of the sliced image is under a predetermined threshold value. analyzing a symmetry of the examining target in the sliced image (224, 244, 320, 340, 424, 444, 522A-522C, 640, 660); and outputting an abnormal result when the symmetry of the sliced image is under a predetermined threshold value.