In order to improve the efficiency of automatic alignment,combined with Ethernet, a new optical path automatic alignment control and detection scheme was describled. The proposed near-far field parallel alignment method implements forward feed back compensation based on coupling matrix and Jacobian image matrix. By introducing the image local adaptive thresholding, image binaryzation, and the fuzzy stepping motor control algorithm, the precision of near-far field image detection was improved with less processing time. The results show that the average far-field alignment error is smaller than 0.44% of spatial filter pinhole diameter, which meets the alignment system requirements(5% of spatial filter pinhole diameter), the alignment time reduces from the original 30 mins to 12 mins.