An image projecting system includes an image projecting device and an information processing device. The image projecting device includes: a driving control unit causing light to pass through filters of colors by time unit based on the image data, to generate light having a desired color tone and corresponding to the image data; a setting unit that sets a color of a light spot on vicinity of the projection surface; and a synchronization signal output unit that transmits, to the information processing device, a synchronization signal specifying, as a timing at which a scene including the vicinity of projection surface is to be shot, a period during which light of a color closest to the set color of the light spot is not projected. An information processing device includes a shooting control unit that causes the image capturing unit to shoot the scene in accordance with the specified timing.