Abstract: A novel thin cloud removal method based on advanced multiscale Retinex algorithm is suggested for color remote sensing image. Typically, the image enhanced by multiscale Retinex algorithm can provide the information in the shadow area, but the cloud in remote sensing image can not be removed directly by Retinex algorithm if it is in the bright region. This new method uses two complementary color operations between which the advanced multiscale Retinex algorithm is applied. The experimental result shows that the new method can remove the thin cloud in the image effectively and provide adequate information.