A transparent display module and a display device are provided. The transparent display module includes a first transparent substrate and a second transparent substrate that are arranged opposite to each other, a transparent display panel and a light source. The transparent display panel is arranged between the first transparent substrate and the second transparent substrate. The light guide plate is arranged between the transparent display panel and the second transparent substrate. The light source is arranged between the transparent display panel and the second transparent substrate, and the light source is located on the side of the light guide plate.