The agricultural production had been difficult in North China and Huang-huai basin because of the severe drought from last winter to this spring. Based on the samples from the developing of deep karst groundwater resources, some laws will be established to reflect the induced polarization anomalies and genesis in the different karst water-rich structure of Taian area. The curves of IP. anomalies in the water-rich structure can be classified into ramp, slow down, low-resistance platform and low-resistance V. The anomalies of IP. cross-section contours of apparent resistivity can be classified into low-resistance step, low-resistance gradient and low-resistance U. In the water-rich areas mainly consisting of caves, IP. anomalies include low apparent resistivity, low vision polarization, low half-life time, low attenuation and low multi-parameter synchronous. In the water-rich areas mainly consisting of fault structures, IP. anomalies have low apparent resistivity and low vision polarization, and show the relevant high half-life time, attenuation maximum value exceptions, apparent resistivity and multi-parameter 'RP' anomalies.