A transparent display apparatus which is used in a transportation apparatus, the transparent display apparatus comprising: a transparent display; a communication unit which receives surrounding situation information; a location detector which detects a location of a user's eyes; a controller which determines a field of view of the user based on the location of the user's eyes and determines a danger element located in an area adjacent to the transportation apparatus based on the field of view of the user and the surrounding situation information; and characterised in that the controller comprises means suitable to: determine from among regions of the transparent display, a region where virtual lines (L1,L2) connecting the user's eye and a first object existing within the field of view of the user intersect with the transparent display as a first penetration region, and a region where virtual lines connecting the user's eye and a second object existing behind the first object intersect with the transparent display as a second penetration region; determine whether the first region and the second region overlap each other; determine, when the first region and the second region overlap each other, that the first object is the obstacle to the second object and the second object is a danger element; and control the transparent display to provide information for informing the user of the danger element on an area of the transparent display with reference to the location of the user's eyes. a transparent display; a communication unit which receives surrounding situation information; a location detector which detects a location of a user's eyes; a controller which determines a field of view of the user based on the location of the user's eyes and determines a danger element located in an area adjacent to the transportation apparatus based on the field of view of the user and the surrounding situation information; and characterised in that the controller comprises means suitable to: determine from among regions of the transparent display, a region where virtual lines (L1,L2) connecting the user's eye and a first object existing within the field of view of the user intersect with the transparent display as a first penetration region, and a region where virtual lines connecting the user's eye and a second object existing behind the first object intersect with the transparent display as a second penetration region; determine whether the first region and the second region overlap each other; determine, when the first region and the second region overlap each other, that the first object is the obstacle to the second object and the second object is a danger element; and control the transparent display to provide information for informing the user of the danger element on an area of the transparent display with reference to the location of the user's eyes. determine from among regions of the transparent display, a region where virtual lines (L1,L2) connecting the user's eye and a first object existing within the field of view of the user intersect with the transparent display as a first penetration region, and a region where virtual lines connecting the user's eye and a second object existing behind the first object intersect with the transparent display as a second penetration region; determine whether the first region and the second region overlap each other; determine, when the first region and the second region overlap each other, that the first object is the obstacle to the second object and the second object is a danger element; and control the transparent display to provide information for informing the user of the danger element on an area of the transparent display with reference to the location of the user's eyes.