Infrared radiation has strong heat selectivity. The absorptivity of the heated object is higher than the around air, so only the object is heated while the temperature of the environment just raises a little. Also infrared heating has the characteristics such as uniform heating, heat penetration, higher energy and processing efficiencies. For blanching and dehydration, the technology has the advantages of shorter time, quicker velocity, less energy consumption and enhancing final product quality. The characteristics of the infrared radiation technology on blanching and dehydration of farm product, the investigation of infrared technology on blanching and dehydration both at home and abroad were described. Further researches of this technology were pointed out.