1. A method of displaying digital broadcasting using a digital device, the method comprising: storing, in the digital device, a plurality of television program listings, each of the television program listing including a title, telecast time information and channel information; displaying the plurality of television program listings on a screen of the digital device; and if a program from the displayed television program listings is selected, displaying detailed information of the selected program on the screen, wherein the selected program has a plurality of data broadcasting programs related to the selected program, and wherein the detailed information includes information of the selected program and/or information of at least one of the data broadcasting programs related to the selected program.