The object of the present invention is to provide a multi-primary color display method and device, which can achieve miniaturization and perform multi-primary color display with high definition and finer gradation without decreasing the time resolution. When displaying an image by four or more primary colors, a first image is formed by light of two or more primary colors, and the image consisting of four or more primary colors is displayed by spatially modulating the first image with a second image consisting of two or more primary colors having spectroscopic characteristics different from spectroscopic characteristics of the light of primary colors forming the first image.