The formula of watching color stimulation about the painting is reasoned out from the object color stimulation by considering the effect of atmospheric attenuate and atmospheric color. The watching color stimulation of four kinds of basic paintings in different distance is calculated under the best atmospheric vantage taking no account of size. The results show that with the increasing of observation distance, the watching chromatic aberration of four kinds of paintings decreases rapidly and the decreasing extent also decreases rapidly. The watching chromatic aberrations of four kinds of paintings are all less than 3at 16 km observation distance to produce color mixture.