Government agencies: Many countries have set up special government agencies to be responsible for vocational skills appraisal, such as vocational qualification certification departments and labor market supervision agencies. These institutions usually formulate appraisal standards and processes according to national laws and regulations and issue corresponding vocational skills certificates.

Educational institutions: Some schools, universities and vocational training institutions also provide vocational skill appraisal services. They can evaluate students' or students' professional skills through curriculum setting and practical assessment, and issue corresponding certificates, academic qualifications or credits.

Industry Association: Many industries have corresponding associations, which are usually responsible for formulating industry standards, norms and vocational skills requirements. These associations can set up special appraisal institutions to be responsible for the skill appraisal and certification of industry personnel.

Third-party organizations: There are also some independent third-party organizations specializing in vocational skill appraisal. They are usually independent non-profit organizations or commercial organizations, which cooperate with specific industries or cross-industries to provide vocational skills appraisal services for individuals or enterprises.

The main task of these professional skill appraisal institutions is to evaluate and certify the professional skill level of individuals in specific fields, so as to help people prove their abilities, enhance their employment competitiveness or meet the requirements of laws and regulations. Due to the different requirements of countries, industries and policies, the specific institutions and procedures may be different.