This book comprehensively and systematically introduces the principles, key technologies and main types of new energy utilization based on the analysis and prospect of global energy development trend and energy transformation law. Starting from the basic law of energy development, this book points out the inevitability of the development of fossil energy to non-fossil new energy, expounds scientifically and prospectively the importance of developing new energy to conform to the law of energy development and to ensure national energy security, introduces in detail various new energy technologies, summarizes the new strategies of traditional energy companies, and expounds respectively current situation and application prospect. The book is divided into four parts. The first one is "e;Energy Trend"e; includes the law of energy development, world energy layout and energy development trend. The second part, "e;New Energy Revolution"e;, includes revolutionary energy technology and energy Internet technology. The third part is "e;New Strategies of Traditional Energy Companies"e;, which includes the new energy distribution of oil companies and coal-fired power companies. Part IV "e;New Energy Theories"e;, includes hydrogen energy, energy storage and new materials, geothermal, nuclear energy, wind and tide and other new energy sources.