Abstract: The disclosure provides a display apparatus and a communication connection method. The display apparatus includes: a display; a communicator, configured to receive information input from the terminal device; and a controller, in connection with the display and communicator and configured to: while the display apparatus is in communication connection with the terminal device, send network information of the display apparatus to the terminal device in response to change of device information of the display apparatus, so that the terminal device generates a request for obtaining device information according to the network information, wherein the request for obtaining the device information is configured to obtain changed device information of the display apparatus; and in response to the request for obtaining the device information sent from the terminal device, send the changed device information to the terminal device, and re-establish the communication connection with the terminal device.