Abstract: Green technology innovation is a key driving force for achieving green development and carbon neutrality, and it is becoming an important emerging field in the new round of global industrial revolution and technological competition. This paper investigates the strategic layout of promoting the development of green technologies recently released by major countries and regions, and analyzes the development trend of international green technology by using patent measurement and text clustering based on PCT patents. The results show that major countries in the world have attached great importance to the strategic layout of green technologies, and proposed R&D and application promotion plans in industries, energy, transportation and other fields. The current main trend is to reduce the cost of key green technologies and further promote large-scale applications. According to the results of patent analysis, since 2000, global green technology research and development had experienced three stages: rapid growth, slow decline, and rebound. From the perspective of technology, green technology in the energy field is the most studied area, with patents accounting for 30.4%. The United States, Japan and Germany are leading the field of green technologies research, and are the main green technology PCT patents application countries. Although the number of PCT patent applications of green technology in China is increasing, there is still a gap between China and the leading countries. Based on the analysis, this paper puts forward three suggestions: 1) grasp the global trend of green recovery, improve the green technology development supporting policies, and strengthen the top-level design to make it a new economic growth point; 2) promote the development and application of green technology in industry, transportation, construction, agriculture and other fields; 3) accelerate the establishment of renewable energy, hydrogen and other clean low-carbon energy system, and comprehensively promote energy transformation.

Key words: Green Technology, PCT Patent, Clean Energy Technology, Hydrogen, Energy Storage, Carbon Capture and Storage, Carbon Neutrality