This book systematically explores and examines what constitutes innovation in energy systems, whether sustainable development can be achieved through such innovation and how, what the innovation potential of existing energy systems is, and how innovation in energy systems should be realized. Focusing on energy, innovation, and sustainable development, this book conducts a comprehensive and systematic study of the connotation, extension, and driving forces of innovation in the energy field, providing valuable reference for the sustainable development and innovation of China's energy system. It serves as a useful resource for researchers and policymakers in energy policy, as well as for professionals in relevant fields at universities and research institutions.