A display device is disclosed. The display device includes a display unit configured to display an image corresponding to contents; a processor configured to extract feature information from the contents; and a communicator configured to transmit, to an external server, the extracted feature information and search range information corresponding to the extracted feature information, and receive, from the external server, additional information corresponding to the feature information matching the extracted feature information in a search field corresponding to the search range information among a plurality of search fields, wherein the processor is further configured to control the display unit to display the received additional information.