Agricultural information website, which takes the mission of providing valid information for the expansive agricultural information demanders, is an important carrier for the state to enact its strategy of agriculture informatization. This paper establishes a set of evaluation measures regarding the service quality of agricultural information websites by setting up the index system of agricultural information websites, evaluates comprehensively agricultural information websites in the following four respects: the range of content, the operation, the benefits and the costs, and finally conducts an empirical research on 13 agricultural information websites in China to test and justify these measures.