The world is undergoing profound changes in energy and technology. Countries are vigorously developing new sustainable energy sources and technologies. Renewable energy sources encompass various technologies such as wind turbines, solar energy, nuclear energy, and bioenergy. Additionally, emerging technology fields include new energy vehicles, robots, and artificial intelligence devices, among others. The renewable energy industries and implementation of new technologies necessitate the development and adoption of new equipment and components. Austempered ductile iron (ADI) is renowned for its unique microstructure and superior properties. By utilizing ADI, lightweight and innovative castings can be designed to not only reduce weight but also save energy and decrease emissions. More importantly, these castings enhance the efficiency and reliability of new energy equipment and emerging technology installations. This paper describes the development, applications, and future prospects of lightweight and innovative ADI castings within sectors such as solar photovoltaic (PV), wind power generation, industry robots, and trucks in China.