Many schools organize students to sign and promise the honesty test, which is the inevitable result of the development of socialist spiritual civilization and the embodiment of social progress and the improvement of students' quality. At present, the Chinese Academy will issue a letter of commitment for the integrity examination of candidates before the large-scale examination, so that students can sign it and hand it in for the record. For example, the senior high school entrance examination, high school level examination, college entrance examination and other examinations must sign a letter of commitment for integrity examination. With the establishment of standardized examination room and the development and application of anti-cheating technology, the possibility of cheating in large-scale examinations is getting smaller and smaller. However, in order to reflect the seriousness of the exam and the determination of the candidates to take the exam in good faith, it is still of practical significance to sign the commitment letter of the exam in good faith, and it is also well-founded in dealing with cheating.