An outdoor display apparatus, comprising: a casing body having an inlet, through which outside air is introduced, and an outlet, through which the air introduced through the inlet is discharged to the outside; a first display panel module placed in the casing body to display an image on a front surface of the casing body; an air suction unit to suction the air into the casing body through the inlet and thereafter, discharge the air through the outlet; characterized in that the outdoor display apparatus comprises: a second display panel module placed in the casing body to display an image on a rear surface of the casing body; transparent members (20a, 20b) on the front surface and the rear surface of the casing body to protect the first display panel module and the second display panel module; an air distribution unit (50,70) to selectively distribute the air discharged from the air suction unit to at least one of the first display panel module and the second display panel module by obtaining at least one of a difference between a first temperature of a first area corresponding to a front surface of the outdoor display apparatus and a second temperature of second area corresponding to a rear surface of the outdoor display apparatus, and a difference between a first quantity of light irradiated to the front surface and a second quantity of light irradiated to the rear surface; and based on the obtained at least one difference, selectively distributing air suctioned into the outdoor display apparatus to a first air distribution path closer to the front surface than the rear surface, and a second air distribution path closer to the rear surface than the front surface. a casing body having an inlet, through which outside air is introduced, and an outlet, through which the air introduced through the inlet is discharged to the outside; a first display panel module placed in the casing body to display an image on a front surface of the casing body; an air suction unit to suction the air into the casing body through the inlet and thereafter, discharge the air through the outlet; a second display panel module placed in the casing body to display an image on a rear surface of the casing body; transparent members (20a, 20b) on the front surface and the rear surface of the casing body to protect the first display panel module and the second display panel module; an air distribution unit (50,70) to selectively distribute the air discharged from the air suction unit to at least one of the first display panel module and the second display panel module by obtaining at least one of a difference between a first temperature of a first area corresponding to a front surface of the outdoor display apparatus and a second temperature of second area corresponding to a rear surface of the outdoor display apparatus, and a difference between a first quantity of light irradiated to the front surface and a second quantity of light irradiated to the rear surface; and based on the obtained at least one difference, selectively distributing air suctioned into the outdoor display apparatus to a first air distribution path closer to the front surface than the rear surface, and a second air distribution path closer to the rear surface than the front surface.