Objective evaluation and analysis on the level of the development of agricultural modernization can help to identify the breakthrough opportunities and development models of agricultural modernization, which are suitable to the China’s economy and the agricultural development conditions. Applying literature review, commentary, and summarization methods, this paper analyzed the key evaluation models of agricultural modernization. It also discussed indicator construction principles, methods and comparison of evaluation results and made comparison of the objectivity, accuracy and availability of data among different ways of evaluation. The paper suggested that the basic theory of evaluation need to be improved to avoid subjectivity when constructing indicator system. This paper also found that although different evaluation methods lead to different results, their judgments on the development situation of China agricultural modernization are same. Finally, this paper pointed out that, under the background of “four modernizations” synchronization, the key problems of agricultural modernization evaluation include how to identify virtuous mechanisms of “four modernizations”, how to summarize the practical experience from the construction of the evaluation index, and how to assign weights to different indicators when constructing evaluation index.