A method for controlling shutter glasses is utilized for viewing stereo images. A video output apparatus respectively outputs a first image and a second image during a plurality of image output periods, alternately. Each image output period includes an image driving period and an image stabilization period. The method includes controlling each of a first shutter lens and a second shutter lens to be switched between an on-state and an off-state. The first shutter lens stays in the on-state within image stabilization periods respectively corresponding to two successive first images, and is switched from the off-state to the on-state and then switched from the on-state to the off-state for at least one time during a time interval between the image stabilization periods respectively corresponding to the two successive first images.