It is not easy to analyze the grey correlation degree in the entropy weight method simply by factor analysis. According to the information on the website of Douding, the paper involves many complicated mathematical models and analysis methods. The principal factor of the data is extracted by factor analysis, the weight of each factor is determined by entropy weight method, and the correlation between each factor is analyzed by grey correlation degree. These methods require in-depth knowledge of mathematics and statistics, as well as proficiency in various tools and software, systematic study and rigorous analysis.