A digital device and a method of processing screensaver application in the digital device are disclosed. The digital device includes a manager to manage a display window of the digital device and to generate and to transmit a plurality of status data of the digital device to a controller, and the controller to receive a first signal from a first application requesting registration as an application voter, to transmit a second signal requesting a confirmation related to execute a second application to the first application when first status data is received from a service interface, to receive a response to the second signal from the first application, and to execute the second application to enter a screensaver mode based on the received response.