Three-system certification refers to the standard system formulated by the International Organization for Standardization (ISO). For example, ISO900 1 is a quality management system standard. O 1400 1 is the standard of environmental management system, and ISO4500 1 is the standard of occupational health and safety management system. ISO system is a global and global international standard for environmental management in the world, which is applicable to organizations of any type and scale.

Ao9001:2015 is a quality management system standard formulated by the International Organization for Standardization (ISO). This standard has absorbed advanced international quality management concepts. Adopting the quality concept of PDCA cycle has strong practicality and guidance for both the supply and demand sides of products and services. Standards are applicable to all walks of life. Hundreds of thousands of enterprises, governments, service agencies and other institutions around the world have introduced ISO9000 and obtained third-party certification. Passing ISO9000 certification has become the basic condition for organizations to enter the market and win the trust of customers.

Ao14001:2015 is an environmental management system standard formulated by the International Organization for Standardization (ISO), which is a comprehensive and systematic international standard for environmental management in the world at present, and is applicable to organizations of any type and scale. Enterprises implementing ISO 1400 1 standard can achieve the goals of saving energy and reducing consumption, optimizing costs, improving corporate image and enhancing competitiveness. Obtaining ISO 14000 certification has become a license to break the international green barrier and enter the European and American markets, and has gradually become one of the conditions for organizing production, business activities and trade exchanges.

Including OHSAS 1800 1 occupational health and safety management system standard, now called ISO4500 1, which is based on its upgraded version. Provide scientific and effective occupational health and safety management system norms and guidelines for enterprises, improve the level of occupational health and safety management, and form a mechanism of self-monitoring, self-discovery and self-improvement, so as to improve the physical and mental health, safety and health skills of workers, greatly reduce cost and improve work.