To provide a method for updating a program related to the display of information on an information display device.

A video signal is displayed on a screen, besides, data are fetched from a computer network, and the program for updating a program related to the display of information on the information display device for displaying the data on the screen is updated. In this case, a server for storing the contents of a home page is provided with a file for the said program and when there is the request of a file from the information display device to that server (S30), the file is transmitted from that server to the information display device. The information display device receives that file (S32) and after it is identified that file is the file for the said program (S34: YES), that file is temporarily stored (S36) and written in a reloadable memory (S38).