1. An endoscopy system comprising: a capsule endoscope swallowed by a test body to capture first kind of images from internal portions of the test body; an image processor for processing image data of the first kind of images, to display the first kind of images on a monitor for a doctor to interpret them; a flexible endoscope having a flexible inserter with an imaging device, said flexible inserter being inserted in the test body to capture second kind of images by said imaging device when the doctor finds it necessary to make a thorough examination of an aimed point inside the test body as a result of interpretation of the first kind of images; an aimed point selection device for selecting an aimed point image that contains said aimed point from among the first kind of images in response to an operation by the doctor; a similarity detection device for detecting similarity between said aimed point image and the second kind of images as captured by said imaging device while said flexible inserter is being moved toward said aimed point; a position information obtaining device for obtaining information on a relative position of said imaging device of said flexible endoscope inside the test body on the basis of the similarity detected by said similarity detection device; and a display device for displaying the information on the relative position of said imaging device.