As a kind of green energy with abundant reserves, zero CO2 emission, high energy density and high conversion efficiency, hydrogen energy has received extensive attention for its development and utilization. By reviewing the new methods of hydrogen production and preparation, new technologies of hydrogen storage and innovative research on the application of hydrogen energy in fuel cells, this paper discusses the development direction of hydrogen energy in the future. It is expected to solve the problems of environmental pollution and resource shortage by producing hydrogen using renewable energy or method of photocatalytic water splitting, and then converting it into electric energy through fuel cells. The development strategies of hydrogen energy industry issued by the European Union, the United States, Australia, the United Kingdom, Germany and China since 2020 are reviewed. It is predicted that the establishment of hydrogen energy system in the future is of great significance to the low-carbon development of energy structure in our world.