Introduction to Heat Transfer Science and Laser Metals Fabrication Process is known for its comprehensive coverage, careful and correct mathematics, outstanding experiences to the energy transfer convert and saving. This new book is to provide a valuable and up to date resource for teaching and learning the engineering heat transfer science from modern point of view. We introducing the fundamental concepts of the engineering heat transfer for both high system performance and energy balance, also to enter level students and help them to build a necessary energy related skill problems. More that we introduce the modern Laser technology for metals fabrication process and study and mathematize the associated heat transfer problems.