A graphics processing method for three-dimensional images, applied to a first buffer for storing right-view contents and a second buffer for storing left-view contents, includes the following steps: sending drawing commands respectively related to the right-view contents and the left-view contents to a drawing engine; when a current Vsync status indicates that a display engine is not operating within a right Vsync period of a right-view frame, the drawing engine drawing the right-view contents stored in first buffer; when current Vsync status indicates that the display engine is not operating within a left Vsync period of a left-view frame, the drawing engine drawing the left-view contents stored in second buffer; during the right Vsync period of the right-view frame, the display engine displaying right-view contents stored in first buffer; and during the left Vsync period of the left-view frame, the display engine displaying left-view contents stored in second buffer.