As the impact of global climate change intensifies, achieving net-zero carbon emissions has become a common goal for governments and businesses worldwide in their pursuit of sustainable development. As the cornerstone of manufacturing, the machine tool industry faces unprecedented pressure to balance economic growth with environmental protection. Against this backdrop, the Taiwan Machine Tool & Accessory Builders’ Association (TMBA) has been driving the establishment of carbon footprint "Product Category Rules" (PCR) for six major categories—machining centers, lathes, drilling/boring/milling/tapping/threading machines, grinders, presses, and EDM/laser machines—since the fourth quarter of 2023. Through the association's committee mechanism, these rules are being developed in a fair, impartial, and transparent manner, creating a credible scope and rules for carbon footprint calculations. This provides the domestic machine tool and component industries with a standard for carbon footprint calculations.