To provide an image display device with which a browser can learn location information of a portable telephone which a person in the image display device has with a simple operation of the browser of the image display device.

A telephone number associated with image data which the image display device 10 accumulates is retrieved from a location information management table which is previously accumulated in an image/portable telephone number accumulation section 109. The portable telephone is called, the location information is obtained from the portable telephone or a position management server, and the obtained location information is overlapped with the image data which the image display device 10 displays to display data.