The scientific evaluation of construction projects after water resources argumentation can provide advantageous guides for us to strengthen and enlarge the work of water resources argumentation of construction projects.Depending on the background and current need of water resources argumentation, it is imminent to set up an assessment system of argumentation from the two aspects of public administration and technology. On this basis, the paper evaluated the first project of Lingwu electrical power station with the method of Analytic Hierarchy Process (AHP). Accordingly, target weights has been constructed according to the scores from investigators and the evaluation results is fine. The evaluation has a certain practical value on the improvement of water resource argumentation system and sustainable development.