To allow a terminal side to easily know an area where an image photographed by a video camera is displayed when the image is distributed to a network.

An image transmission system and an image transmitting method are applied to a system which transmits the image photographed by the camera through the predetermined network and makes the side having received the transmitted image display it. On the camera side, data on the installation position of the camera, data on the direction wherein the image is photographed by the camera, data on the tilt angle at which the image is photographed by the camera, and data on the installation height of the camera are registered. On the basis of the respective registered data, a photographic range of the camera is drawn on a map, and map data having the photographic range drawn are sent out through the network. The map data sent out to the network are received and displayed to display the position 101 of the camera and the photographic range 102 showing what range is photographed from the position on a map 100.