This book aims to provide clear picture of overall situation of hydropower development by measuring social, economic, political and environmental factors with different parameters. This factors analyzing make easier to understand a single glance of energy sector of Nepal. The book was written on the basis of the literature review drafted the Nepal Government, private and public companies, word energy organization, non-government organization(NGOs), international non-government organizations(INGOs), individual power producers association of Nepal(IPPAN), hydropower journals and water resources journalists. All the possible supporting facts and evidence were collected and analyzed.