Abstract: The Chinese Pharmacopoeia 2020 edition 9205 guideline requirements for microbiological monitoring and control of pharmaceutical clean laboratories has an important value for the analysis methods, daily test operations and management processes of cleanroom-related clean parameters. By analyzing the updated comparison with the 2015 edition, comparing the relevant domestic and international standard regulations, from the detection items, details of project requirements and specific operational implementation, and the results of daily inspection work experience, the key indicators in the general rules were re-evaluated and proposed to improve the project or add new items to provide reference for the next edition of the pharmacopoeia guidelines revision.