1. Laboratory certification (metrology certification) is one of the important work contents of legal metrology management. For testing institutions, the entry of testing institutions into the testing service market is a mandatory approval system, that is, only institutions with metrology certification qualifications and legal status of metrology certification can provide testing services to the society.

2. National laboratory accreditation is a voluntary capacity accreditation activity consistent with the foreign laboratory accreditation system. Prove that it meets the internationally accepted calibration or testing laboratory capacity requirements.