Occupational health and safety management system (OHSAS18001) is a management system standard, with the purpose of reducing and preventing losses and damage caused by accidents, as well as environmental destruction.

OHSAS18001 certification is a substantive manifestation of a company's commitment to fulfilling its obligations to the public or employees to maintain a safe working environment and protect employees from injury in the course of work.

OHSAS18001 is a management system standard jointly researched by thirteen famous certification institutions in the United Kingdom and international standardization organizations. The content of the standard is based on the guidance document OHSAS18002 and was formally published in 1999. Its content orientation has developed into a compatibility with the content of ISO9001:2000 (quality) and ISO14001:1996 (environment) management system standards, which can make a company's quality, environment, and occupational health and safety management systems "integrated", and can more effectively improve a company's management performance, thus bringing economic returns.