The present disclosure provides a transparent display device, including a transparent display panel and at least one full color light source. The transparent display panel includes a first substrate and a second substrate provided opposite to each other, and a polymer liquid crystal mixed layer located therebetween. The light source is located at a side of the first substrate distal to the second substrate, and an orthographic projection of the light source on a plane where the first substrate is located is outside the first substrate. The light source is configured to emit light of at least two colors toward the transparent display panel in a time division manner.