In an image display system which has a management station for saving, in a server, management data that contains at least names, identification numbers, and connection numbers of image sensing devices, and is described in the data description language, and the display style of the management data, and a display device, and which displays a video obtained from an arbitrary one or more image sensing devices connected, the management data of the image sensing devices is read out from the server, the display style of the readout management data is read out from the server, and an image is generated and displayed by applying the management data to the display style.