Abstract: Active Fuzzy Database System （AFDBS）, is composed of fuzzy database （FDBS）, fuzzy rules lbrary （FEB）, fuzzy event monitors （FEM）, trigger i udge（TJ） and event processor（EP）. The FEB consists of the fuzzy event-driven rules. Deals with the AFDB composition

Key words: Fuzzy ECA, Fuzzy FEM, Definition of fuzzy data , Fuzzy data store