The heavy pollution industries in Liaohe River basin are concentrated, and the water environment pollution is serious. Through analyzing the heavy pollution industrial wastewater treatment technologies, and aiming at the problems of treatment technology utilization ranges and the industrial characters, fuzzy-grey comprehensive evaluation method and hierarchy analysis method were employed to carry out multi-parameter, comprehensive evaluation in terms of treatment efficiency, discharge reduction and cost. As the evaluation processes involve both complex mathematic models and large amount of calculations, the evaluation efficiency is not high, and the accuracy is very difficult to guarantee. In this paper, computer software for the realization of the evaluation was developed, and the thought of evaluation system, structure and evaluation functions etc were designed. It showed that the evaluation system of wastewater treatment technologies can greatly improve the efficiency and accuracy of the evaluation.