SSOP ? system is a preventive system to control hazards based on GMP and main. Its main control objective is food safety. Therefore, compared with other quality management systems, ISO 22000 system can focus on the key processing points that affect product safety, instead of putting a lot of energy into every step, which is more effective in prevention. ? ?O O22000:2005 is built according to the framework of ISO900 1. At the same time, it covers all requirements of the Codex Alimentarius Commission (CAC) for HACCP, and defines "SSM" for the concept of "prerequisite" of HACCP. SSM O 22000: 2005 is defined as "specific control measures" rather than "key control measures" that affect food safety. It achieves the purpose of control by preventing, eliminating and reducing the possibility of harm.