The vision and color resolution after binocular correction can meet the requirements of nondestructive testing. There is an age limit for applying for NDT certificate. Applicants need to be 18~60 years old, and each level also has different academic requirements. Because of the need of work, there are also requirements for vision, which requires correction of vision, normal color resolution of eyes, and can complete daily work. Applicants are also required to be in good health, free from major diseases and able to work normally. As a skill certificate, nondestructive testing certificate can promote job seekers to find similar related jobs, and holding such a certificate can increase the competitiveness of the post.