As a practical system of personal computer,an Operational Typhoon System in South China has been developed in meteorological offices to meet the needs of the operational forecast and services. There are two versions suitable for the regional meteorological center and its sub-observatories respectively. This system consists of typhoon data managing,typhoon predicting,service distributing and demonstrating sub-systems and a technological process for typhoon forecasting. By the use of this system,the procedures of typhoon predicting will be simplified,therefore forecasters will get rid of heavy manual works.