When forming an image by developing a color development layer that reacts to a light, the image formation processes (color development, color erasure, and/or fixing) that can be performed simultaneously with information recording are performed in the same period as that of the information recording to reduce the time required for image formation. An image formation device that forms an image by developing a color development layer reacting to a light comprises a color development unit that develops colors by focusing a light on the color development layer, color erasure units that selectively erase the developed colors by focusing a light on the developed color development layer, and a fixing unit that fixes an image formed by the color erasure wherein the color development unit and/or the fixing unit performs processing in a period in which information is recorded on the recording medium on which the color development layer is provided.