This book explores the machinability mechanism of hard-to-machining materials under hybrid energy field, with a particular emphasis on the development and modification of green lubricants, the integration of multi-energy field assistance, and the intelligent machining equipment. It offers a comprehensive overview of cleaner precision manufacturing techniques, multi-energy assisted processing applications, and sustainable manufacturing practices, presenting innovative strategies for energy conservation, emission reduction, and the advancement of an eco-friendly society. By enhancing the sustainable use of bio-lubricants in intelligent machining and utilizing multi-energy field assistance to improve grinding and turning performance, this book provides a green, clean, and precise machining approach that prioritizes environmental protection, resource efficiency, and energy sustainability, while addressing the compatibility challenges between intelligent machining systems and clean energy applications.