Nowadays, one of the most important challenges is global warming. Both developed and developing countries are advocating to reduce carbon emissions and achieve carbon neutrality. To limit climate change caused by the global increase in CO2 emissions, solutions and sustainable fuels must be found for generating carbon neutral. The key to facing this challenge is to continuously promote concepts of renewable energy and industry coupling, which means combining renewable energy with industrial, energy and transportation infrastructure, and insisting on utilizing Power-to-X solutions. We promote the conversion of renewable energy (solar energy, wind energy, water energy) into "green" hydrogen energy through the method of producing hydrogen by water electrolysis, reducing energy waste, and it is becoming an ideal model for the global energy transition.