The article explores the theoretical aspects of decision making in the field of engineering. The purpose of this article is to propose a decision making model with broad applicability and differentiated decision making evaluations in order to improve students' ability to learn during the water economics course. The main novelty and contribution of this article is that the proposed multi-attribute decision-making method is more objective and does not require rich subjective experience from decision makers in the application process, which is especially suitable for beginners who learn in the water. engineering economics course.