1. A method of displaying a capsule-endoscope image comprising: generating image stream data transmitted from a swallowable capsule endoscope inserted into a body, and generating a time bar corresponding to the generated capsule-endoscope image; displaying the generated capsule-endoscope image on a main-display area of a first page of a diagnosis screen; displaying the time bar on a time bar display area of the first page of the diagnosis screen, the time bar having a time slider which indicates a position corresponding to information about time and distance of a current capsule-endoscope image displayed on the main-display area; displaying at least one capture image on a sub-display area of the first page of the diagnosis screen when the capsule-endoscope image displayed on the main-display area is captured; shifting the capture image on the sub-display area in such a way that the capture image is linked with a movement of the time slider positioned on the time bar, or moving the time slider on the time bar in such a way that the time slider is linked with a movement of the capture image; and when there is an observer's request for changing the size of the sub-display area: enlarging the sub-display area on the first page to display the capture images on the enlarged sub-display area on the first page, or reducing the enlarged sub-display area on the first page to the original size of the sub-display area to display the capture images on the sub-display area on the first page.