Welder's certificate includes operation certificate and grade certificate. The operation certificate is the certificate for the welder to engage in welding work, which shall be handled in the Safety Supervision Bureau (valid for six years, and the first trial for three years). Special operations personnel must receive special safety technical training suitable for this type of work, pass the theoretical examination of safety technology and practical operation skills examination, and obtain the operation certificate of special operations before taking up their posts.

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The grade certificate must be handled in the Labor Bureau (a notebook, which is valid for life and does not need to be examined annually), and the five grades (primary, intermediate, advanced, technician and senior technician) are the proof that workers have the necessary knowledge and skills to engage in a certain occupation.

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Welder's grade certificate is the qualification certificate for workers to apply for jobs, take up posts and start businesses. It is the main basis for employers to recruit workers and an effective certificate for overseas employment and foreign labor cooperation personnel to notarize their skill level.

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The welder's certificate, whether it is a job certificate or a grade certificate, needs to go to a qualified school to study for the registration exam, which is handled by the school in a unified way.