I 類環境 : 層流潔淨手術室、層流潔淨病房

II 類環境 : 燒傷病房、重症監護病房、器官移植病房、血液病病房、產房、新生兒室等

III 類環境 : 消毒供應中心、輸血科、急症室、各類普通疏科室、注射室、輸液科以及門診等

Class I environment: laminar flow clean operating room, laminar flow clean ward

Class II environment: burn ward, intensive care unit, organ transplant ward, hematology ward, delivery room, neonatal room, etc.

Class III environment: sterilization supply center, blood transfusion department, emergency department, various general medical departments, injection room, infusion department and outpatient clinic, etc.