The development of energy, particularly in the field of electricity, has been one of the priority sectors in the frame of succeeding the national development plan of Indonesia. This sector has played an important role for the success of the national development. In the frame of globalisation era where business competition is very tight, Indonesia is enhancing the fulfillment of energy need supply for the coming sustainable development. As the result, a number of hydro power plant, coal power plant, diesel power plant, solar energy, etc. have long been in existence to support the national development. Above all, Indonesia will also soon build its nuclear power plant. The development of energy sector certainly deserves codification in the form of publication. This book, which is a part of technology in Indonesia is specially published to disseminate information on energy development achieved within 50 years of Indonesia independence. It is expected that this publication will become a reference for the government in setting up the program, strategy of energy development in the coming years. Apart from that, it is also expected that this publication will become communication media of the business community involving in this sector.