An apparatus and method for performing a multi-picture in a display device are disclosed. The apparatus includes a demodulation unit demodulating a plurality of broadcast signals, which include video signals, audio signals, and supplementary information including genre information, a video processing unit converting at least one of the video signals into data representing a displayable main picture and data representing one or more displayable sub-pictures, and a controller selecting at least one of the video signals corresponding to at least one selected genre based on the demodulated genre information, wherein the controller controls the video processing unit to convert the video signals corresponding to the selected genre into the sub-picture data.