Abstract: An auto framing method is applied to a camera apparatus with an image receiver and a screen. The auto framing method includes receiving a detection image from the image receiver, computing a distance between the image receiver and an identification feature of the detection image, switching a framing mode of the screen into a normal mode or a single mode in accordance with a comparison result of the distance and a predefined distance threshold, setting a preset step count and a preset frame interval to compute a coordinate variation of the identification feature when position difference between a current focus area and a cropping area generated by the framing mode conforms to a predefined difference condition, and utilizing the coordinate variation to acquire an area variation of the cropping area, and scaling the cropping area to a target resolution for displaying on the screen in accordance with the area variation.