Disclosed is a method for video object segmentation, which includes the following steps:(a) detecting a changing state between a current frame and a previous frame; (b) categorizing the current frame as a moving region, a still region, a background region and an uncovered background region according to the detecting result from the step (a); (c) determining a moving object in the current frame according to the sorting result from the step (b); and (d) updating a background component.