Provided are a device and method for displaying an execution result of an application. A method of displaying an execution result of an application includes: in response to a user input, displaying execution results of a plurality of applications, which are being executed in the device, in a plurality of windows that are displayed in at least two display modes; arranging the plurality of windows, which show execution results of the plurality of windows, to be adjacent to each other and displaying the plurality of windows on a display; receiving a user input when the plurality of windows are displayed on the display; and scrolling the plurality of windows in response to the user input.