热力循环与总能系统是本世纪能源与环境科学的主要议题之一,也是在国家中长期科技规划中位于优先领域的需要关注的重点。本文分析了该学科的地位和作用,指出了学科交叉的发展特点,提出了学科发展方向:能的梯级利用与热力循环创新、能量释放的新机理、中低温能源转换利用与正逆耦合循环、多能源综合互补系统、控制污染排放的新途径。本文提出的热力循环与总能系统发展战略旨在开辟节约能源、能源与环境协调发展的新方向。 The thermodynamic cycle and the total energy system are one of the major topics in the energy and environmental sciences of this century. They are also the focus of attention that needs to be given priority attention in the medium and long term science and technology planning of the country. This paper analyzes the status and function of this discipline, points out the development characteristics of interdisciplinary development, and proposes the direction of subject development: the cascade utilization of energy and thermodynamic cycle innovation, the new mechanism of energy release, the transformation and utilization of low and medium temperature energy and the coupling of positive and negative cycles, Multi-energy integrated complementary systems, new ways to control pollution emissions. The development strategy of the thermodynamic cycle and total energy system proposed in this paper aims at opening up a new direction of energy conservation and coordinated development of energy and environment.