Cloud condensation nuclei(CCN) have an important role in the water cycle and climate change.CCN can participate the cloud microphysical processes and determines the concentration and original particle size of the cloud droplet, then influence the precipitation efficiency.The impact of anthropogenic emissions on aerosol and cloud properties is significant.The cloud climate effect is one of the most factors that lead to the uncertainty in the climate prediction in the forth IPCC assessment.Therefore, the research of CCN properties will have important significance on weather and climate prediction.