The infrared radiant track along meridian course(IRRTM)over human body surface could be elicited by local heating acupoint or non-acupoint along meridian course. The thermal conductivity of the corresponding tissues along meridian course was better than that of nonmeridain area. The physical character between the two was really different in certain aspect. This discovery provided an important basis for further clarifying the mechanism of the appearance of IRRTM and the substantiality of its formation.