Sustainable Development of energy is a problem that every country in the world needs to consider, which is a huge challenge to the adjustment of energy structure of every country. In China, hydropower is a high-quality and renewable energy source, and the key to the implementation of the Paris Agreement and the implementation of China’s emission reduction commitments lies in China’s hydropower. At present, the application of UNFC in the field of water energy resources is still in the preliminary stage, the research group on water energy resources established by the United Nations is in the research and development stage, and there are no examples of application in the field of water energy resources on its website. In this paper, we collected the data of China’s hydropower projects, which have been put into operation and are being surveyed and exploited, is preliminarily based on the core theory of UNFC, through the actual reference indicators of some projects, the impact of the impact has been identified, pros and cons of such information, classified assessment. On the basis of the 2019 revised UNFC, the classification and evaluation system is analyzed and summarized in the light of the hydropower resources utilization projects that have been put into operation and are being surveyed and developed in China. The basic three-dimensional framework of UNFC and some applicable terms are retained in the analysis process, in combination with the actual situation of China’s projects, the inappropriate parts are modified to adapt to the application of China’s hydropower resources utilization projects. The purpose of this paper is to find out the key points that need to be paid attention to when using the UNFC, and how to evaluate the project reasonably, so that it can be used as an evaluation tool to evaluate the water energy resources utilization projects .As a decision-making tool that has been put into operation, it can provide decision-making and reference guidance for hydropower resource utilization projects under research and development and projects to be developed in the future, and provide a certain reference for countries to achieve their goals. it can provide decision-making and reference guidance for the water energy resources utilization projects being investigated and developed and the future projects to be developed, it can provide some reference for countries to achieve the goal of sustainable, environment-friendly, carbon-neutral and efficient development.