The invention discloses a method for realizing the displaying of high dynamic luminance range images by a plurality of projecting cameras. The method comprises the following steps: firstly, the position, the projecting angle and the display size of each projecting camera is adjusted to ensure that the projection display regions of all the projecting cameras on a screen have an overlap region; secondly, all sub controllers synchronistically receive high dynamic luminance range images, conducting coordinate conversion and color conversion on each pixel of the received images, and then synchronistically transmitting the processed images to the controlled projecting cameras; thirdly, a main controller is used for controlling all the sub controllers to synchronously receive the high dynamic luminance range images, and synchronously transmit the processed images to the controlled projecting cameras. The method has the advantages that the projecting lumen and the projecting luminance contrast can be improved, the black level can be better shown, and HDR images can be displayed by projecting, namely, the color value which exceeds the common range (0 to 255) can be displayed by projecting so as to ensure that the projecting image is full of sense of reality on the aspects of deepness, detail and color and the like.