Abstract: This paper selects fourteen indexes to analyze the sustainable development level of fourteen cites in Hunan province by means of factor analysis and clustering analysis.Factors affecting the development level of are classified as four kinds，which are investment and development factor，standard of living factor，industry structure factor and foundation factor.According to the variable of weighted synthetic factor scores，it classifies the development level of cities in Hunan as four grades and analyzes the development instance respectively.

Key words: sustainable development, factor analysis, cluster analysis