Abstract: As a green,low-carbon,and efficient secondary energy,hydrogen energy has gradually attracted wide attention. The entire hydrogen energy industry chain is closely linked in all aspects of production,storage,transportation,and utilization,involving numerous key technological innovations and the integration of related industries. This paper reviews the key technologies and their development status of each link in the hydrogen energy industry chain,including production,storage,transportation,and utilization. Relevant suggestions are put forward for the key technologies of hydrogen energy utilization,and prospects are made for the development of hydrogen energy industry of China. At present,the development of the hydrogen energy industry is developing rapidly,among which,alkaline water electrolytic（AWE） hydrogen production,high-pressure gas hydrogen storage,and hydrogen fuel cells and other technologies have been preliminarily demonstrated and applied,but there are still key technical shortcomings to be broken through. For example,the controllable preparation of low voltage,high current density and high stability electrode materials in AWE hydrogen production,and the preparation of highly reliable and durable catalysts and proton exchange membranes in hydrogen fuel cells.Regarding the future development of hydrogen energy industry of China,on the one hand,it is necessary to break through the research and development of key technologies and core materials;On the other hand,it is necessary to fully leverage the synergistic effect of hydrogen-electric coupling,achieve consumption of electricity from renewable energy that cannot be connected to the grid,and accelerate the construction of a new energy system.