Stereoscopic image displaying method

The invention relates to a stereoscopic image displaying method comprising the following steps: generating a plurality of right eye picture frame data and a plurality of left eye picture frame data according to original image data, multiplying the frequency of the first right eye picture frame data in all the right eye picture frame data to generate a corresponding first right eye frequency multiplication picture frame data, multiplying the frequency of the first left eye picture frame data in all the right eye picture frame data to generate a corresponding first left eye frequency multiplication picture frame data, outputting the first right eye frequency multiplication picture frame data for two consecutive times in the first picture frame cycle, and outputting the first left eye frequency multiplication picture frame data for two consecutive times in the second picture frame cycle following the first picture frame cycle. The stereoscopic image displaying method improves the optical uniformity of the liquid crystal display device when the liquid crystal display device displays the stereoscopic image, avoids the generation of the vague image and enhances the stereoscopic image displaying quality.