A display device linked to a vehicle which transmits a request for point of interest (POI) information based on sensing data of the vehicle to an augmented reality (AR) digital signage platform providing system; recognizes a spatial location of a building associated with POI information; transmits a rendering request for generating AR digital signage corresponding to the POI information on a floor-by-floor basis; receives a rendering result comprising the generated AR digital signage; displays a driving image acquired through a camera having the AR digital signage mapped to a display area in the driving image; and in response to the display area being changed in the driving image, transmits, to the system, information related to the changed display area and receiving an updated rendering result for mapping the AR digital signage to the changed display area in the driving image.