Provided is a display apparatus. The display apparatus includes at least one component; a storage configured to store at least one rule to diagnose the at least one component; and a controller configured to: acquire operation data of the at least one component, output at least one of a warning related to the at least one component or an error related to the at least one component based on a result of applying the operation data to the at least one rule, acquire at least one of installation environment data of the display apparatus or operating environment data of the display apparatus, and update the at least one rule based on the at least one of the installation environment data or the operating environment data.