An image-capturing device uses a light reflecting member to redirect an exterior light image toward a lens module in order to focus the light image onto an image-capturing unit. The image-capturing device includes a rotating unit for driving the light-reflecting member to rotate within a limited range in such a manner that the image-capturing device can capture at least two light images of different photo-ing areas and combine them into one single combined image without a need of moving the image-capturing unit and the lens module. When a user takes a panoramic or wide-ranged picture, he/she doesn't need to move the whole image-capturing device, but only needs to stand at the same position, faces the same direction and simply pushes the shutter button, and then the image-capturing device will automatically capture light images of different photo-ing areas and then integrate them into one single panoramic or wide-ranged picture.