In this study, a satellite calibration spectrometer (SCS), as a standard calibration load on HY-1C, was used for calibrating the remaining instruments on the same satellite platform. Further, the cross-calibration method was used to evaluate and verify the accuracy of on-board calibration by comparing the radiances and reflectances obtained via SCS and moderate-resolution imaging spectroradiometer (MODIS) with respect to the same ground area. By processing the calibration data four times on different dates, the maximum relative deviation of the radiance is observed to become less than 3%, which meets the calibration requirement with respect to the remaining loads on the HY-1C platform.