This paper used the data of 12 monitoring sites of soil moisture in 4 counties of Hunan Province to verify the adaptability of integrated diagnosis model in humid regions of Central China. Model was established by the data of 12 monitoring sites in 4 counties in Hunan Province during the period of 2012-2014, and validated by the data of 2015. The results showed that the model had good adaptability in humid regions of Hunan Province, and the qualification rate was over 85%. The qualification rate of the model showed a tendency to increase with the decrease of average precipitation over the years.