Abstract: Infrared radiation has hot effect and can make molecule of organism produce the effect of resonance and absorbtion. It can ameliorate local blood circulation, relieve spasm and pain and adjuvantly treat lats of disease after radiating human body. There is good application prospect, especially at the therapy of tumor. The technique and device of infrared does not damage human and does not pollute environment. It can diplay the screenage on body's organ metabolism function, while other diagnosis apparatus can not do these. It develops a new domain of medical screenage technology on functiology. It provids means and technologe of screenage dipiay for disease diagnosis and medicine research. It piaies an important role in medical practice and summary.