A digital television receiver including: a tuner configured to receive a broadcast signal; a video processor configured to decode video data contained in the broadcast signal and output video signal for displaying the video data; a communication module configured to establish a connection through a network to a first server providing first content data in a first format and a second server providing second content data in a second format; an image processing module configured to generate a first link image for connecting to the first server by the communication module and a second link image for connecting to the second server by the communication module; and a controller configured to control the video processor to output the video signal for displaying the first link image and the second link image.