A method for displaying screen data according to determination of a view mode in a portable terminal, and an apparatus thereof, are provided. The method includes detecting an orientation change event of the portable terminal in a displayed state of the screen data, turning-on a camera module when the orientation change event is detected, determining an orientation of eyes of a user through face detection from an image captured by the camera module, determining a view mode of the portable terminal according to an orientation of the portable terminal and the orientation of the eyes of the user, and displaying screen data according to the determined view mode.