Eddy covariance and Bowen ratio measurements were carried out over different surfaces, and used to characterize the daily variation of energy fluxes and energy balance under different weather condition. These will be used to identify the phenomena to be addressed in future modeling works. Results show that (1) The diurnal variation characteristics of the fluxes were different over different surfaces, especially the latent heat flux, (2) The energy imbalance persisted in different surfaces with an average about 20%; the energy balance closure was better in the afternoon than in the morning averagely, possibly suggesting the underestimation of storage terms, which are usually larger in the morning.