The invention discloses a method and a display for the ordered display of stereo image data on a plurality of display areas of a display panel. The display comprises a display panel; a backlight module provided under the display pane and comprising a first backlight region and a second backlight region; light sources equipped at two sides of the two backlight regions respectively; and a light-guiding element equipped between the display panel and the backlight module. In the control method, data is transmitted to each region in order; if the data update of any one region is completed, the light source of the backlight region corresponding to the region is turned on according to the received image signal, without requiring all regions of the display panel to complete the data update. Therefore, the invention can increase the utilization rate of light source of backlight module and increase the brightness of display panel.