Water conservation is the primary task of implementing the General Secretary Xi Jinping's water governance concept of “prioritizing water conservation

balancing spatial distribution

taking systematic approaches

and promoting government-market synergy”

as well as implementing the National Water Conservation Action Plan. By using objective

comprehensive

and scientific investigation methods to accurately and truthfully obtain the actual water consumption of water appliances and conducting relevant influencing factor analysis

which has an important reference and guidance role in comprehensively understanding the water conservation situation and formulating subsequent water-saving strategies. This article starts with the most important sampling and analysis key steps in the water-saving survey of water products

adopts a comprehensive survey method from double-perspective

innovatively constructs a water-saving survey index system and index library

and uses a correlation clustering analysis model to analyze the correlation and trend of key water-saving indicators. The above key technologies are verified in Beijing city as a case study

which can provide reference for market research

industry supervision

policy research

and other aspects of water-saving and water-using in China.