This course is intended for students who already have good materials, advanced mathematics, college physics foundation, and are interested in engineering practice problems. The course will systematically introduce the basic theory, solution mode and application of the three traditional heat transfer modes on the basis of basic fluid cognition, and then explain the fourth heat transfer mode -- phase change heat transfer. The theory of the course is combined with the practice, aiming at the design and application of new energy system, fully elaborates the practical application of various heat transfer methods, and deepens the understanding and cognition of heat transfer problems. This paper mainly introduces several cases of applying new technologies and new solutions to practical engineering problems, and experiences the process of engineering technology innovation. Through the study of this course, students will have a basic understanding of heat transfer, understand the basic concepts and core of various heat transfer processes. To understand the basic mathematical description of conduction, convection, radiation and phase change heat transfer and the way to solve the problem. Combine with practical cases, master the specific process of applying theory to engineering practice, experience the application of theory to analyze and solve the phenomena and problems in engineering practice, and cultivate students' ability to analyze and solve problems.