In our daily life, turning on the light or receiving a glass of water from the tap in the kitchen is considered a natural convenience. However, energy and water are important resources, and the relationship between them is little known. If a country or region lacks these resources, it will limit its ability to use other resources. The production of energy affects water supply and water quality, and the production of drinking water requires a lot of energy. Population and economic growth, climate change, government policies and many other aspects have put further pressure on the use of water and energy. Water and energy have gradually become increasingly important demands of developing economies.