Abstract:The Muzhu River Underground Reservoir Project in Weihai Municipality was completed and impounded in June 2022, ready for water supply. In terms of full play of water supply efficiency of reservoir, this paper analyzes the water supply potential and capacity, combines the local and coverage-reach area water supply and demand conditions, water sources, and water plant layout. On this basis, suggestions are proposed for integrating the Muzhu River Underground Reservoir into the water supply system and maximizing its water supply efficiency, so as to better serve the local high-quality development.