Disclosed are a display device and controlling method thereof. The present invention includes a communication unit configured to perform a communication with a terminal device located in a preset distance, the communication unit configured to receive terminal device's information including an identifier of the terminal device, a controller determining whether a card included in a card group exists by searching the card group associated with the received terminal device's identifier, and a display unit, wherein if the card included in the searched card group exists, the controller displays a main card and wherein if the card included in the searched card group does not exist, the controller outputs a notification message.