Abstract: Based on the atmospheric dispersion model from VDI3784 guidelines of Germany, the influencing factors of plume rising height from Cooling Tower according to the meteorological and source emission parameters were analyzed. The results showed that compared to the wind speed, atmospheric stability had more important influence on the plume rising height. With the stability changing from strong unstabitily (A class) to strong stabitily (F class), the plume rising height gradually decreased, and the average range was 764 meters. With the wind speed changing from small calm wind (1 m/s) to the strong wind (20 m/s), the average plume rising height reduced 509 meters. The different source parameters’ effect on the maximum rising height was very small, and the rising height was likely to reach the maximum in certain weather conditions. But the effects of source emission parameters on the average rising height and minimum height were more obvious. The most influential parameters were temperature and gas flow rate, and the average range was 418 meters and 213 meters, respectively. But the variation effect of relative humidity and liquid water content in the flue gas on the average rising height was not significant.