Disclosed are a multimedia device that may simultaneously display advertisement broadcasting of a current viewing channel and another channel broadcasting when advertisement broadcasting starts in the current viewing channel, and a method for displaying advertisement broadcasting thereof. The multimedia device, which includes a display screen of a predetermined picture ratio, comprises a receiver receiving a digital broadcast signal that includes a broadcasting program and an advertising program; a decoder decoding the digital broadcast signal; and an advertising/broadcasting program switching module splitting the display screen into a first screen and a second screen if the advertising program is detected from a current channel, displaying the advertising program of the current channel on the split second screen and at the same time displaying a predetermined content on the first screen, incorporating the split first and second screens into one screen if the advertising program ends from the current channel, and displaying the broadcasting program of the current channel on the one screen.