Abstract: The development and utilization of hydrogen energy is one of the most important ways to deal with global climate change, ensure national energy security, and achieve the low-carbon transition. The key parameters of hydrogen energy storage technology are compared with the current mainstream energy storage technologies. The results indicate the overall systemic advantage of hydrogen energy storage technology over others. The potential application of hydrogen energy in the integrated energy system and the future key technological breakthroughs are explored in the aspects of industrial users, transportation, combined heat and power in new construction, energy companies, and so on. In particular, this paper enlightens the roadmap of hydrogen energy development for China in the future. The results can provide references for the application of hydrogen energy in integrated energy systems.