Abstract: In order to study the role of the rural economy in Hunan agricultural informatization, this paper used the 2000-2010 in Hunan Province agriculture and agricultural informatization index of output data, the indicators of agricultural informationization on principal component analysis to extract the information after two main factors in the scale and information technology Human resources with the agricultural economic output for the co-integration test and granger causality test. Results showed that, the Hunan Province agriculture informationization level and rural long-term stable equilibrium relationship between economic output and bidirectional causality, relevant suggestions were put forward according to the conclusion.