In the world today, most of our energy supplies come from coals, petroleum and oil, solar energy, nuclear energy, wind power, geothermal energy, etc. But hydrogen is receiving much attention as an alternative and clean energy source because of the environmental problems created by the current energy supplies. This project studies the current energy situation in the world and discusses the importance of hydrogen energy and understands the key elements of hydrogen energy and research areas. The objectives of this project is to compare the hydrogen energy with the current fossil fuel energy, to review the current research and development on hydrogen energy in the areas of hydrogen production, hydrogen storage and transportation and hydrogen utilization and to identify the areas that need more attention in the future to realize the hydrogen economy. The aim of this project is to keep up to date with the fast developing technologies in the areas of hydrogen energy and identify potential research and development opportunities in the area.