The invention discloses a multifunctional long core radial multi-pair point dynamic monitoring displacement system. The system comprises a displacement system, a resistivity measurement system and a metering device, wherein the displacement system comprises a gas displacement device, a foam displacement device and a fluid displacement device, the displacement system is connected with a resistivitymeasurement device through a valve, the resistivity measurement system comprises a long core holder, a patrol detector and a resistivity measuring instrument, and the metering device is an oil-gas water three-phase automatic metering device. The system is advantaged in that the displacement system and a back pressure device are utilized to control a displacement type, a displacement mode and change pressure difference at the rock sample end surface and the fluid velocity in the rock sample, the characteristic that the ratio of oil and water in the rock core leads to difference in resistivityis utilized, resistivity change corresponding to multiple pairs of points in the entire water driving oil process is measured in real time, and saturation changes in the core at different stages are acquired through combining resistivity curves, and remaining oil and gas distribution in the core after the water driving oil process is acquired.