Based on the geological structure of Handan area of Hebei province and the observation date more than 20 years, the normal and abnormal dynamic variations of ground deformation and groundwater as well as their relationship are analyzed. The main two control factors for the ground deformation in Handan area are Taihang mountains rising at west and the continual settlement movement of the northern China plain at east, which caused deformation slan to southeast. But after regional periodic heavy rainfall the deformation slan to northwest, because of the difference of geological structure. Both are normal variations. The anomalies in the deformation and groundwater level are extructed by effective methods, the result indicats that there was a good correspondence between a part of anomalies of opposing northwest slant and northern China plain moderate and strong earthquakes. So it should not be set dowe as interference that the ground lean with a wide and periodic hesvy rainfall. In a sence, it is a factor from out side to induce ground deformation and earthquake. So we shoule attach great importance to the factor.