This book is a textbook written for undergraduate professional courses in new energy. The book consists of nine chapters: introduction, basic elements of economic evaluation, basic methods of economic evaluation, uncertainty and risk analysis, analysis methods for effective energy utilization based on the laws of thermodynamics, feasibility study of new energy construction projects, full life cycle analysis methods of new energy systems, sustainable energy development and post-project evaluation, and new energy technology and economic forecasting. Its content meets the basic requirements for the teaching of energy economics for new energy undergraduates.