Abstract: With the improvement of water quality requirements for power generation units, the supervision of water quality has gradually become a potential stock for energy conservation, consumption reduction, safety and stability, and economic improvement of power plant units. This article mainly introduces the application and research of a boiler turbine efficiency guaranteed water and steam quality monitoring system for a 1000MW coal-fired power plant. The system's composition, function, and effectiveness have played a good role in improving the safety, economy, and reliability of the power generation unit, and thus assisting the sustainable development of the enterprise.