At present, China's social and economic development is faster and faster. At the same time, people pay more and more attention to the construction concept of energy and water conservation. We can see the popularization and development of the concept of energy saving and water saving in every major field of our country, the same is true in the construction field. In order to effectively protect the ecological environment and maximize the use of limited resources, the energy-saving and water-saving technology of the building, as well as water supply and drainage technology should be actively used. Based on this, this paper first analyzes the application significance of water supply-drainage and energy-water conservation technology in the construction field, analyzes the current situation of water supply and drainage in China, and proposes the application of water supply-drainage and energy-water conservation technology of the building for reference.