The paper presents fire blight prediction model s and systems, developed in Europe (system BilIing - versions: BOS, BRS, BIS95 and originated from this system: Firescreen, FEUERBRA and ANLAFBRA) and in United States (Californian, system, model Maryblyt and system Cougarblight). Use of above models and systems in various climatic-geographic conditions and comparison of obtained prognostic data to real fire blight occurrence is reviewed. The newest trends in search on improvement of prognostic analyses parameters with their adjustment particular conditions and consideration of infection source occurrence are also sented.