Building energy-saving transformation is: on the basis of analyzing the climatic and environmental conditions around the building, through site selection, planning, external environment and body design, the building can obtain a good external microclimate environment and achieve the purpose of energy saving.

Building energy saving is the sum of energy saving in all aspects of the whole life cycle of a building. In the process of site selection, planning, design, construction and use, energy-saving building materials, products and equipment are adopted, building energy-saving standards are implemented, the operation management of energy-saving equipment for buildings is strengthened, the thermal performance of building envelope is reasonably designed, the operation efficiency of heating, refrigeration, lighting, ventilation, water supply and drainage and pipeline systems is improved, and the energy consumption of buildings is reduced by using renewable energy on the premise of ensuring the building use function and indoor thermal environment quality.