Abstract: Traditional vision measurement methods are not applicable for remote objects in large area. A simple vision measurement method is put forward to locate the remote objects in large area accurately. By using the simple calibration method, the transverse epipolar planes of the two cameras are horizontal and coplanar. On the basis of vision measurement principle, a simplified model of vision measurement for calculating the coordinates of impact point was built. And this model was used to locate the 44 object points in the whole field of view of the two cameras in 250 m350 m measurement area. Experiment data shows that the overall relative measurement error of this model is less than 0.3%,which is a good measurement accuracy.