The water receiving areas of the South-to-North Water Transfer Project are suffering the most serious water shortage. We analyzed the water conservation in the water receiving areas in accordance with the requirements of the most stringent water resources management system and the national water security strategy of giving priority to water conservation. Based on the analysis of the existing water-saving evaluation indexes, we constructed evaluation indexes and standards that can comprehensively reflect the regional water consumption structure and the whole-process water utilization efficiency of the whole society. By adopting the single-index evaluation method, we systematically analyzed the comprehensive water-saving situation and water saving trends of different industries in the water-receiving areas before and after the water supply (from 2003 to 2015), and we used a comprehensive evaluation system to evaluate the water utilization efficiency of the water-receiving counties and cities in 2015. The results showed that in recent years, the water-receiving areas made great efforts to save water and improved their water utilization efficiency substantially. However, compared with international advanced water-saving level, the water saving work of these water-receiving areas still needs to be improved and has much potential to be explored.