Based on Night Vision and Electronic Sensors Directorate (NVESD) Target Acquisition Performance (TAP)models, the clutter impact on human-in-loop TAP is analyzed. Aimed at characteristics of laser jamming image, a modified TAP model based on clutter metric is applied to analyze laser jamming image. Then, an evaluation method for laser jamming effect based on Probability of Edge (POE) metric is proposed. The method combines with human target acquisition task and laser jamming effect evaluation is researched from the aspect of laser jamming influence on human search and detection probability. Experimental results of laser jamming to CCD show that the method can reflect the influence of laser jamming image on search and detection probability and can reflect laser jamming effect evaluation effectively. Hence, the validity of this method is verified.