Abstract Shandong Peninsula, as a more developed region of economy and society in Shandong province even in the east coast of China, is facing challenges from resources and environment pressures. As the scope of economy expanding, the water's restriction to the development of economy and society is more and more evident. This paper tried to track and assess the harmonious status between the water resource and environment's Status and the development of economy and society in Shandong Peninsula in order to provide decision support for regional sustainability. This paper analyzed the water's development situation through calculating the total amount of water recourses, the balance of water's supply and demand and the utilization effects of water recourses and gave the aftereffect of environment because of inconsequential development and use. With Delphi and AHP methods, an appraisal index system was built including five aspects of harmony degree (A), sustainability degree (B), opening degree (C), stability degree (D) and controllability degree (E). The results showed that:1) Shandong peninsula belongs to the essence coordination type and the indexes of opening degree and sustainability degree are above the average level; 2)The economic increase of Shandong peninsula belongs to extensive mode and depends on amount input of funds, labor and the excessive consumption of resource; and 3)water resource becomes the main factor that constrained the coordination of economy, society and environment in Shandong peninsula. The paper provides quantitative gist to the majestic target of designing resource-saving based society.