Measurement of target characteristics is predigested to point target radiation intensity and area target thermal radiation in this paper.Based on the consistency of calibration and measurement,the calibration of responsibility and linear rate with radiation measurement equipment is predigested to point target radiation intensity and area target thermal radiation.Then,methods of calibration,advertent proceedings,uncertainty of calibration,and so on are analyzed.Finally,the implication of equivalent noise radiation and methods of calibration are described.