The automated contour system based on observation data was introduced. The cont our method in IDL was applied and real time data of local automation weather station (AWS) data, including temperature, precipitation, wind speed and wind direction, and air pressure, was processed and contour plot maps from them was generated then transferred to the WEB page, animation was played and the ma ps can be queried. The system was used widely during the 29th Olympic Games to provide decision support for weather forecasting, and also as an effective tool to monitor the weather. Forecasters can conveniently use the system to perform c ase study analysis.