SNR is used to analyze target gray characters to its neighbor pixels. According to these low SNR moving puny targets, an adaptive template matching method has been proposed to extract these targets by part Hausdorff distance in measuring the similarity between the templates and target images. Then combined with adaptive thresholding technique, targets precision pixel dimensions can be calculated in given pictures. Critical experiments results of different target images sequences show that this algorithm is fast, stable and flexible with much reference value in related Automatic Target Recognition and location fields.