Water evaporation in Huizhou traditional dwellings has played a positive role in environment formation. Evaporation model was built by analyzing heat balance of water evaporation. The model was calibrated against evaporation data which were obtained from field measurement in traditional dwellings. The results show that the model could effectively predict the water evaporation process in Huizhou traditional dwellings. In addition, the error of standard deviations and the average relative error between calculate values and experimental values are 41.5 g/(m²·h) and 4.2%, respectively. Correlation analysis results show that the water evaporation is most correlated to the ground temperature, followed by solar radiation, wind speed, relative humidity and air temperature, and the correlation coefficients are 0.909, 0.779, 0.736, -0.654 and 0.622, respectively.