The present invention relates to a display device and a display method. The display device comprises a display panel and a video stream provider, wherein the display panel comprises a display screen and a separation module; the video stream provider provides one or two video streams, the one or two video streams are coded before entering the display screen to form a video signal source, and the video signal source is input to the display screen in a single-channel form; and when the video stream provider provides two video streams, the separation module separates a picture displayed in the display screen into two pictures respectively specific to the two video streams to realize double-view display. In the present invention, the two video streams are provided by the same video stream provider and may be previously coded, so that the complexity of transmission of the video signal source is greatly reduced.