Choosing a school for graduate school is not only about matching the major, but also about the strength and resources of the school. For the examination of big data majors, Nanjing University of Posts and Telecommunications is a good choice, because Nanjing University of Posts and Telecommunications has a strong strength and reputation in the field of information and communication engineering. The School of Information and Communication Engineering of Nanjing University of Posts and Telecommunications has certain research strength in the fields of Big Data and Artificial Intelligence, and has good faculty and experimental conditions. Considering the professional background and resource advantages of Nanjing University of Posts and Telecommunications, choosing Nanjing University of Posts and Telecommunications is a more appropriate choice when taking the big data specialty exam. Of course, the final choice also needs to be based on personal interest and development planning, and comprehensively consider the characteristics and conditions of each school, as well as the degree of suitability of the professional direction provided.