In view of the vocational work undertaken by the meteorological stations at prefectural level,a computerized "three-in-one" weather forecast and service system is developed. Through the above-metioned system, weather information will be speedily received from the meteorological stations at higher levels,prompt and satisfactory weather service and instructions could be provided to the relevant units and individuals,the grassroots meteorological stations. Thus weather stations at prefectural level will play a greater role in economic construction and disaster prevention.