Abstract: Based on the physical meaning and geological implication of gravity and magnetic anomalies, the geological factors to form the gravity and magnetic anomalies are discussed. The correspondence between the rocks and the residual gravity and magnetic anomalies and their combination are analyzed. The results reveal the characteristics of geological process that is reflected by the combination of residual gravity and magnetic anomalies. With the recognition of the characteristics of formation and reformation of abnormal geological bodies, 8 permutations of 4 combinations of gravity and magnetic anomalies and their geological implications are summarized.