A method and system for automatic zoom adjustment is disclosed. Content is displayed on a display screen for a user. In an auto-zoom mode, a first and a second pictures are acquired. Pre-determined features are detected from the first and second pictures. A first and a second feature distances are computed based on the pre-determined features detected from the first and second pictures, respectively. The first and second feature distances relate to the user's head movement relative to the display screen. An adjustment to the zoom of the content on display is determined based on the difference between the first and the second feature distances.