To evaluate the imaging quality of a CCD camera rapidly, the Signal to Noise Ratio(SNR) was selected as the evaluation factors, a measurement system was constructed and methods to measure the camera′s noise based on the output images of the camera were researched. The noise from the linear CCD camera was analyzed, a model for computing the SNR was established based on the fix pattern noise sources and temporal noise sources and the impact of Correlated Double Sample(CDS)processing on the power supply noise source was analyzed. A rapid measurement system for the SNR of camera in industry applications was designed, and a scheme to measure various noise sources was proposed by analyzing the theoretical model,practical tested data and 8 bit output images. Finally, the non-uniformity of the light source in the measurement system was discussed and it demonstrates that the light source meets the requirements of EVM1288 industry-standard. Experiment results indicate that the SNR of the camera reaches to 44 dB when the AD gain is set to be 8.7 dB, and it reaches to 46 dB if the interference of the non-uniformity from light source are eliminated. It concludes that the proposed scheme has higher measuring speeds, and satisfies the system requirements of SNR measurement for industry applications.