Abstract: According to the imaging of the CCD camera Principle, taking full account of the Earth's atmosphere on the absorption and attenuation of the radiation of the universe, the introduction of a multi-regional image exposure time adjustment factor derived multi-region image exposure time and external light changes in the relationship between the model to solve the shortcomings of the current method; CIS based on the current multi-region exposure time, gain and exposure output value to determine the current multi-region image illumination intensity, set the multi-region image of the rapid automatic exposure control basic parameters, according to the multi-region image of the external light Intensity range look-up table to determine whether the multi-region image exposure intensity value is within the target exposure intensity value, and adjust the automatic exposure time and the brightness gain value of the multi-region image to realize the exposure control. The experimental results show that the proposed method can realize the rapid automatic exposure control of multi-area images, retain the details and the stability is good.