Provided are a display panel and display device. The display panel includes a first display region and a second display region adjacent to the first display region. The second display region includes multiple first light-emitting elements, the first light-emitting element includes a first electrode, a second electrode and a light-emitting layer located between the first electrode and the second electrode, a direction from the light-emitting layer to the first electrode is a light exit direction of the display panel, the second electrode includes a photochromic layer, the photochromic layer includes a photochromic material, the second electrode includes a first state and a second state, and a light transmittance of the second electrode in the first state is greater than a light transmittance of the second electrode in the second state.