Abstract: Objective To understand the content and characteristics of the EU cosmetic undesirable effect monitoring system and to provide reference for cosmetic adverse reaction monitoring work in china. Methods The background, progress and characteristics of the EU cosmetic undesirable effect monitoring system were studied, the differences and relations were also analyzed. Results and Conclusion The EU system offers clear definitions of cosmetic undesirable effect and detailed provision on communication and countermeasures of serious undesirable effect with an advanced causality assessment standard, the related information is kept confidential. All mentioned above are of certain reference value to cosmetic adverse reaction monitoring work in china.

Key words: undesirable effect, cosmetic, EU