The invention proposes a novel 2D/3D polarized display method, polarized display device and a 2D/3D television, applied to the polarization 3D technology; through compensation calculation on the original left-eye and right-eye image signals and alternate time domain display of the images, and through the addition of information on the compensation images in time and space, and in cooperation with control of the opening and closing of the polarization 3D glasses, while viewers wearing the polarization 3D glasses can experience good 3D effect, other viewers with naked eyes can view clear 2D images, so that the 3D viewers and the 2D viewers do not affect each other.