Experimental  and Numerical Research of Pulse tube Refrigerator, Stirling cryocooler,Thermoacoustic engine;
   Enhanced Heat Transfer Technology and its Industrical Application;
   High Efficient Utilization of Low-Quality Energy (Solar Energy, Waste Heat, et al);
   Optimization of Refrigeration and Cryogenic System (household & automotive Air-Conditioner,Refrigerator, Heat-exchanger,et al) and Thermal Management of Electrical Equipment （CPU, Motor, LED, et al）
   Thermodynamic Analysis and Optimum Design of some Thermophysic Problem related to Thermal Conversion and Utilization.