A summary of foreign master's degree theses. At present, the evaluation of dissertations in foreign developed countries usually adopts "peer review", that is, experts in this field or adjacent fields evaluate the scientific value of research work through communication or on-site contact. Peer review model is an evaluation system generally recognized by the world scientific community. "Scientific judgment is made by the same person who knows this person and this matter best", which is the essence of peer review. In the United States, master students apply for defense after writing their papers, and submit their own applications and the recommendation letters, papers and abstracts of their tutors. After the Steering Committee of the Department agrees to accept the paper review, 2-3 reviewers will be appointed to review the paper, with the tutor as the main reviewer. Reviewers are required to submit their paper comments to the department steering committee, and they can only reply after being approved by the committee. In France, according to the regulations, before a student's thesis defense, the principal should employ at least two professors with corresponding qualifications to review the student's thesis, and the thesis review committee is also appointed by the principal. Germany stipulates that the topic selection of master's degree thesis is proposed by the chairman of the examination committee, guided by the professor, and evaluated by two examiners, one of whom is the topic selection professor and the other is decided by the chairman of the examination committee. In Canada, however, it is required that the master's thesis should include the contributions of predecessors in this field, and the director of the department should appoint a Committee of more than three people, including the tutor, to review and make an oral defense. The internal review mechanism of master's degree thesis abroad has played a very important role.