Hydrogen is the most abundant element in the universe, making up 75% of the mass of the universe, the third most abundant on Earth, and its large reserves ensure its sufficiency as an energy supply. Hydrogen is mainly in the form of water, and raw materials are very easy to obtain. In addition, hydrogen energy supply mainly reacts with oxygen to generate water and release chemical energy, and its product has no other intermediate products except water. There is no waste and zero pollution in the whole energy supply process. It is also the key development direction to promote the green and low-carbon target of the energy system. With the increasing attention to the development of green economy worldwide, the demand and application fields of hydrogen energy continue to expand, and hydrogen energy is known as the new energy in the 21st century. From the upstream and downstream of the hydrogen energy industry chain, the upstream of the hydrogen energy industry chain is hydrogen production. It includes hydrogen production (the main technical methods include coal hydrogen production, industrial by-product hydrogen production, natural gas hydrogen production, electrolytic water hydrogen production and other processes), hydrogen purification, hydrogen liquefaction and other links. The main storage and transportation technologies include gaseous storage and transportation, liquid storage and transportation, solid storage and transportation, and organic liquid storage and transportation, covering hydrogen storage devices, hydrogen transportation, etc. The downstream of the hydrogen energy industry chain is the comprehensive application of hydrogenation and hydrogen. Related to hydrogen refueling stations and equipment, as well as transportation, industrial, construction applications.