In this paper, the non-boiling evaporation (30 -70?) of the fixed droplets on the Aluminum plate surface was investigated by the experiment. The effect of the plate temperature and initial volume on the contact angle, contact diameter and evaporation time were considered. The results showed that the temperature and initial volume were important for the droplets evaporation. As the heating plate temperature increased, the evaporation rate increased and the initial contact angle decreased. At the same heating plate temperature, the evaporation rate and the initial contact angle decreased with the increase of the droplets initial volume. At the constant temperature hydrophilic surface, the droplet evaporation is performed in two modes: Constant contact radius mode (CCR mode) and mix mode. The CCR mode were about 90% of the time at the droplets evaporation process and the droplet contact diameters kept constant with the increase of the evaporation time. For the mix mode, the contact angle and contact diameter decreased with the increase of the evaporation time.