A user terminal for running a plurality of applications simultaneously is disclosed. In the method for running a plurality of applications simultaneously in accordance with the present invention, a first application is run in a foreground mode in accordance with an inputted first operation start command, and then the operation mode of the first application is switched to a background mode if a mode conversion command is inputted. Then, a second application in accordance with an inputted second operation start command can be run in the foreground mode. With the present invention, a plurality of applications can be run simultaneously in a separate operation mode, maximizing the convenience of the user.