In a method for correcting a target position, a three-dimensional matrix is formed by piling up, in a Z-direction at predetermined intervals, matrix planes each formed by continuously connecting, in X- and Y-directions, quadrangular areas that are parallel to an XY-plane and each have a reference point, and a target position of a work robot designated in an operation space of the three-dimensional matrix is corrected. In this method, a first block and a second block are set which are individually contiguous with the specific block, and the target position is corrected based on respective reference points in the upper area and the lower area of the specific block, the first block, and the second block and the measured deviation amount of the work robot from the reference points.