Mr. Fan Lin’s photo album of Infra-red is going to be published. Different from photographic works that we have easy access to, Infra-red is an art collection of infrared photographic works. It takes us into a world paradoxically familiar and strange world where we experience unknown visual shock. Infrared photography is an ordinary but special branch of various photographic arts. It is ordinary because its imaging principle is no different from other photography, that is, the light upon an object is reflected and becomes an image through the lens of the camera. Early in 1910, people already discovered the special dye which could serve as sensitizer of color infrared and attempted at shooting scenery photos. In World War I, infrared film used for military and scientific purposes were invented and gradually used for civilian purposes.