According to GB "grade microbiology laboratory animals and monitoring" (GB 2002-05-01) and "experimental animal parasitology grade and monitoring" (GB 2002-05-01) in experimental animals microbiology and parasitology class monitoring and classification requirements, in accordance with the national standard "laboratory animal environment and facilities" (GB 14925-2001) for the Classification of environmental conditions and technical requirements, biosafety laboratory animal facility environment corresponding divided into:

Common Environment: The environment and facilities to meet the basic requirements of living animals, control of infectious agents can not be totally suitable for breeding purposes in the general level of teaching experimental animals.

Barrier Environment: The environmental clean-class facility suitable for breeding animals and specific pathogen free (SPF, specific pathogen free) animals, the environment and strictly control personnel, goods and ambient air in and out.

Isolation Environment: The environment and facilities using aseptic or sterile isolation device to save animals without external contamination. Keep the air inside the isolator, feed, water, bedding and equipment are sterile, dynamic transfer of animals and materials shall be subject to a special delivery system that can guarantee with absolute isolation environment, but also to meet the animals during transport consistent with the environment. The environment and facilities suitable for rearing specific pathogen free (SPF), gnotobiotic (Gnotobiotic) and sterile (germ free) experimental animals.