An apparatus and method for monitoring the movement of eyeball comprises collecting an image frame of pupil extracting a pupil pixel set (S) extracting a boundary value of the pupil pixel set setting a center point based on the boundary value and dividing the pupil pixel set into four quadrant sets (S1, S2, S3 and S4) calculating the coordinate of cross points of the two straight lines and traversing points in the four quadrants, wherein the cross points form a pupil center coordinate set (S5) and calculating an average value of horizontal and vertical directions according to the pupil center coordinate set (S5).
