Methods, apparatuses, and systems for interlinking applications/apparatuses are described. In one method herein, a terminal apparatus displays a User Interface (UI) screen of an operable/running application from among the applications stored on the terminal apparatus. When metadata is input into the operable/running application corresponding to the displayed UI screen, an application which is interlinked with the operable/running application is provided with all or some of the metadata which was input into the operable/running application.