Water scarcity has emerged as a top-tier global issue for both environment and development. However, how to mitigate water scarcity is a real problem. We choose Shandong Province in China with heavily overloaded water as our research object., we propose an intervention plan concerning social consciousness, pollution control, water source and industry structure. With the intervention plan, we regard Shandong as an input-output system to project the future water availability, in which intervention plan is input and impact of the plan is output. The process of calculating the direct and interactive impact that plan brings is the key component of the system using neural network algorithm. Ultimately, we reach the conclusions that Shandong will become less susceptible to water scarcity and water won't become a critical issue in the future due to our prevention plans.