Based on the data between August and October from 1971 to 2007 in Shandong, several disasters are evaluated. The results show that there are 9 kinds of meteorological disasters that may influence the 11th Chinese National Games, and the risk grades in different months vary. To sort the risk grades from low to high, the influencing meteorological disasters in August, September, and October include: thunderstorm, rainstorm, typhoon, fog, hail, heavy rainfall, high temperature, continuious rain, and strong wind in succession in August; thunderstorm, fog, strong wind, rainstorm, heavy rainfall, typhoon, high temperature, and hail in September; heavy rain, fog, strong wind, continuous rain, rainstorm, high temperature, hail, and typhoon in October. The occurence probability of metereological disasters is very low on the opening ceremony day and closing ceremony day. The evaluation results were applied in the meteorological support of the 11th Chinese National Games