A multi display device includes a first body including a first display, a second body including a second display, a hinge configured to connect the first and second bodies, and a controller configured to display a toolset including tools corresponding to an operation state of the multi display device on a screen of at least one of the first and second displays when a user manipulation to display a toolset is input, and to perform an operation corresponding to the selected tool when one tool is selected from the toolset.