In this paper, we design the attribute system based on the "Regulations on the Disclosure of Government Information" and relevant policies.Then we score the proactive information disclosure websites according to the displaying factors, and finally we use the entropy method to calculate the weight of each attribute and the evaluation value of each website to assess the ability of their proactive information disclosure.In the case analysis, we select a certain province composed of 15 cities in the eastern part of China as the empirical study.The empirical study shows that the entropy method is meaningful and practical for the evaluation of proactive disclosure of government information in its infancy.