The relationship of fire and weather factors was analysed by using of meteorological data and 1443 fire events at Zhenjiang city of Jiangsu province in seven years.Fire weather type was divided and fire weather index was given.Then,the stepwise regression equation of index forecast of fire weather at Zhenjiang was established by using of T106 products.The forecast accuracy of the operational experiment in two months is 83.6%.The service system of fire weather Index Forecast was developed.