To improve the accuracy of radiation work standards and meet the urgent need of high-accuracy remote sensors calibration, a study about establishment of irradiance of standard lamp with spectrum range from 400 to 900 nm is carried out using the cryogenic radiometer as the primary standard and filter radiometer as the transfer standard. Through with a recursive iterative optimization algorithm, a physical model of the irradiance standard lamp and a filter detector spectral response system level calibration by a laser imported integrating sphere, the continuous spectral distribution of the irradiance standard lamp can be calculated. The method of system level calibration avoids the uncertainty induced by filter transmittance, geometric factor measurement uncertainty and discord between use and calibration states. Preliminary results show that the difference between standard lamp irradiance calibrated by ITS-90 black body and calculated value by the method is within the uncertainty of calibration. The transfer stand of an irradiance standard lamp based on cryogenic radiometer is tried in China. The method could greatly improve the accuracy of current optical radiation work standard. The research has important significance in the optical radiation measurement and remote sensors, especially in hyper-spectral remote sensors calibration.