A digital broadcasting apparatus and a method for providing a service thereof are provided. In the digital broadcasting apparatus, a storage unit stores a designated target mode between a picture in picture (PIP) mode and an application mode running a downloaded application program, an embodiment unit provides a PIP function corresponding to the PIP mode and an application function corresponding to the application mode, and a control unit controls the embodiment unit to provide at least any one of the application function and the PIP function, based on the stored target mode, when the PIP function is activated at present.