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The Chinese environmental mitigation HJ satellite CCD sensors are capable of large area and all-time monitoring, and have a great advantage in coverage and frequency of repeated observations. However, as a relative newly remote sensing sensor, it is essential to evaluate the data quality for further applications. Based on the introduction of HJ CCD sensor and combined with LandSat TM data, the geometry accuracy and radiance quality of HJ CCD data was quantitative evaluated in this paper. The results showed that: ①There is no deviation between the 4 bands of HJ CCD, and compared with TM, very small geometric distortion is detected (0.05%). However, there′ s large geometric error in both X and Y direction. ②There is no obvious difference in radiation range and signal to noise ratio between the two sensors, but the image sharpness of CCD data can only achieve about half of TM, which leads to …