Correspondence University is a degree in adult education. Correspondence is one of the learning forms after the college entrance examination for adults, and it is also a teaching method. Correspondence is mainly self-study and face-to-face instruction. The main links of correspondence teaching include self-study, face-to-face teaching, homework, answering questions, experiment, practice, assessment, graduation design and defense.

Correspondence University is an adult university. Candidates study by correspondence. Candidates don't need to go to school at ordinary times, but only need to use online video to study, and use the annual winter and summer vacations and holidays to conduct centralized face-to-face lectures and exams. Correspondence University's academic qualifications are recognized by the state, which can be consulted in Xuexin.com.

China has developed higher education in various forms, such as radio and television universities, correspondence universities, evening universities, management cadre colleges and teachers' further education colleges.

Correspondence is an important form of adult college entrance examination. Colleges and universities pass the national unified adult college entrance examination and issue admission notices. It belongs to the national education series and is included in the national enrollment plan. The state recognizes academic qualifications, participates in the national unified entrance examination, and all provinces and regions organize admission. Correspondence and night university are just different in name, but in fact they are the same. The forms of classes are also night classes and weekend classes.