Two common-used simulation modes of stomatal conductance, the Ball model and the Jarvis model, and the artificial neutral network (ANN) were employed to simulate the dynamics of summer stomatal conductance of six common greening species in cities of northern China. Results show that, the Ball model is the best one for the simulation of Chaenomeles speciosa and Sophora japonica, and the Jarvis model is the best for the simulation of Magnolia liliflora; while the ANN model is the best one for the simulation of Prunus yedoensis, Forsythia viridissima and Cercis chinensis. This indicated that the ANN model could improve the simulation of stomatal conductance. The multiple regression and sensitivity analysis show that PAR is the most important and sensitive factor of the stomatal conductance in summer; while Ta is the most not sensitive one.