Abstract: According to the color variations of different geological bodies in the same wave band or the same geological body in different wave bands, a close geological interpretation was made onthe ETM+ and Spot images ofthe East Tianshan orogen.As a result, interpretation markers for the strata, intrusive body and structures are established. The interpretation allows us to accurately define the strata boundaries and structures locations on the ETM+ and Spot images. The strata and intrusive bodiesin the mapping area can be divided into different units based on the field survey. The structures including faults and fold can be identified in this area. It is believed that remote sensing image can play an important role in geological mapping.