Agriculture information has played an important part in recently years. The adoption of agriculture information is a dynamic process and many factors have influences on farmers’ information usage motivation and willingness. The main objective of this paper is to analyze and predict the variations of farmers’ decisions in order to make the information more reachable to farmers. In this study, farmers are divided into three categories based on the style of risk preference, which are the risk evaders, risk likers and risk neutrals. To compare the difference of the information adoption rates across varied sections of farmers, we extend our research and the factor of time is added into the model. A sample of 34 farmers takes part in the continuous surveys with the duration of one year. By the simulation and analysis in the light of the information usage intention equation, it is found that farmers’ information demand presents a characteristic of seasonality and keeps stable after a period.