3D display technology has become the frontier and hot issue in recent yesrs, and its display quality is gradually caused attention.For quality measurement of stereoscopic display, test methods of the crosstalk, angle crosstalk, brightness, the difference of binocular brightness and the brightness uniformity difference of stereoscopic displays are given in this paper. The most popular LCD display and PDP display samples are selected to detect, and testing values of stereoscopic display with different size are compared. Through experiments, influences of mentioned index on different stereoscopic displays are obtained.Results show PDP displays with active shutter technology have a large watching angle and a lower crosstalk than LCD displays.