According to the characteristics of agricultural informatization development in Gansu Province from 2001 to 2010, the evaluation indicator system for agricultural informatization development level is established for 20 indicators from 5 aspects, including information network construction, agricultural information technology application, agricultural information resources, agricultural information human resources, and agricultural informatization development environment. Indicator weight in indicator system is determined by analytic hierarchy process. Evaluation results of agricultural informatization development level in Gansu Province are obtained using weighted linear function. The difference of agricultural informatization development level is analyzed in different time periods in Gansu Province. According to the evaluation and analysis results, recommendations are put forward for promoting agricultural informatization development in Gansu Province.