Based on the study of "four-modernizations" of scholars at home and abroad, this paper constructed a new indicator system of industrialization, informatization, urbanization and agricultural modernization based on the data from 1998-2015 in Hunan Province. Through the methods of factor analysis, geometric mean, harmonious degree evaluation model and other methods to calculate Hunan "four- modernizations" coordinated development value. The results showed that during the period of investigation, the index of development level of Hunan's "fo...