This book explains the new technology of super (super) critical thermal power generating units. The content includes the selection of super (super) critical units, the technical characteristics of boilers, steam turbines, and generators; it also focuses on the heat-resistant material properties and welding processes of super (super) critical units, main auxiliary machines, thermal systems, chemical processing technology, automatic control technology, unit optimization, environmentally friendly desulfurization, accident handling and other technical characteristics. This book can be used as a training material for personnel engaged in the operation and maintenance of super (super) critical generator units before taking up their jobs. It can also be used as a reference for technical personnel engaged in the design, manufacture, and installation of supercritical thermal power generator units, as well as teachers and students majoring in thermal dynamics in universities and technical secondary schools.