radiometric calibration is an important part for space remote sensing camera to obtain an accurate radiation value of ground target. the main significance of radiometric calibration is to reduce the influence by external scene and internal parameters of camera and to recover the real radiation property of objects. in order to break the limitation of line array imaging sensor, we propose a radiometric calibration method based on camera state matrix for area array camera. according to camera response characteristics, calculate and fit a functional relationship between the input radiance energy and the output digital number. meanwhile, analyse and describe the procedure of radiometric calibration in detail. experimental results indicates that the calibration method can provide high accuracy linear fitting parameters and can be widely applied to a large variety digital imaging systems. © 2016 spie.