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The water displacing oil physical simulation system and modeling method based on radial basic function network is presented in this paper. The 512 routes strobe circuit and the constant current source which can adjust the range intelligently are designed in this simulation system. According to the approximate linear relationship between the resistance rate value and the water saturation, the resistivity is measured using four wire method. The radial basic function network was used to establish the water displacing remaining oil model. We construct the structure of radial basic function network, and adopt the K-Nearest Neighbor algorithm and least square method to train the network. The experimental results show that this simulation system and modeling method is feasible and effective.