Amid the global shift toward net-zero carbon emissions and smart manufacturing, the machine tool industry is accelerating its transition toward higher efficiency, lower energy consumption, and greater intelligence. This article highlights ITRI’s green machine tool technologies, focusing on two key directions: advanced materials and digital twin optimization. Carbon-fiber composites and mineral casting are applied to improve lightweight design, damping performance, thermal stability, and energy efficiency. Meanwhile, a collaborative digital twin platform integrates AI analysis, process simulation, and energy optimization to reduce trial cutting, shorten development time, and improve machining performance. By combining advanced materials, AI, and digital twins, these technologies support the industry’s move toward higher-value, low-carbon, and sustainable manufacturing.