Abstract: Based on the aerosol and cloud data from the Moderate-resolution Imaging Spectroradiometer (MODIS) satellite, and the precipitation data from the Tropical Rainfall Measuring Mission (TRMM) in summer from 2006 to 2016, we analyzed the spatiotemporal characteristics of aerosols, cloud, and precipitation over eight typical regions in China, and we examined the interaction between aerosols and cloud and precipitation.The results indicated that the values of summertime averaged Aerosol Optical Depth (AOD) and cloud optical properties vary in the following ranges:AOD in 0.21-1.05, Cloud Optical Depth (COD) in 15.01-24.02, Cloud Water Path (CWP) in 151.98-219.20 g·m^-2, Cloud Effective Radius of Water (CERW) in 12.93-15.37 μm, Cloud Effective Radius of Ice (CERI) in 28.85-39.14 μm, and precipitation in 0.44-8.54 mm·d^-1, respectively.The AODs have a significant decreasing trend over the Loess Plateau and Sichuan Basin, with an annual declining trend of -2.30% and -3.20%, respectively.The COD over the Yangtze River Delta increases by 29.11%.The variation of CERI is -21.60% over the North China Plain, -15.77% in the Yangtze River Delta, -18.94% in the Pearl River Delta, respectively, and the CERW over the Taklimakan Desert varies in about -10.30%.AOD has a positive correlation with CWP and COD and a complex relationship with Cloud Effective Radius (CER), which is largely affected by water vapor.Under the low CWP conditions, AOD exhibits a negative (positive) correlation with CERI (CERW), but an opposite correlation occurs under the high CWP conditions.The relationship between aerosols and precipitation is also complex.Overall, aerosols promote summertime precipitation in China.