A display apparatus includes: a display; a data processor configured to process content data to be displayed as a content image on the display; a user input interface configured to receive biometric information about a user; a communication interface configured to communicate with an external apparatus; and a controller configured to identify the user based on the biometric information received through the user input interface, and control, if it is determined that the identified user is also a user of an external apparatus, the content data to be displayed as the content image on one of the display apparatus and the external apparatus in which a user interest is relatively high.