Green building materials refer to the materials that have the least impact on the earth’s environment and are harmless to human health in the process of raw material collection, product manufacturing, product usage, and recycling. The green building material industry chain is similar to the traditional building material industry chain, which constitutes residential, commercial, industrial or public construction materials. Industry upstream products include a wide variety of raw materials for building structures such as cement, mortar, foaming materials, boards, roof tiles, steel, glass, hardware accessories, piping, coatings, films, heat insulation materials, adhesives, caulking agents, and sealing strips, etc. The midstream is composed of structures or components that make up the building, including roofs, walls, doors and windows, floors, furniture, pipelines, etc. The downstream includes construction companies and relevant service providers.

　　Facing the trend of international sustainable development and recent focuses on health and comfort, the global construction industry is in a transitional stage. In recent years, green buildings and net-zero energy buildings are gradually receiving increased attention. According to a report by the IMARC Group, the green building market is expected to enjoy continuous growth, global green building market value will reach 432.5 billion US dollars by 2024. Taiwan has also increased the number and types of green building material labels in recent years due to the revision of laws and regulations. Building material manufacturers are also committed to developing innovative products. The green building material industry chain is relatively long, so it is suitable for companies to develop through cross-industry cooperation. Through the establishment of the green building material industry map, upstream, midstream and downstream manufacturers can be integrated to help Taiwan industry expansion into the international market and enhance international competitiveness.