The mutual diffusion coefficients of [mmim]DMP/CH3OH and [mmim]DMP/H2O systems at a temperature of 293.15 K, atmospheric pressure of 101.3 kPa, CH3OH and H2O mass fractions of 20% to 50%, and magnetic fields of 0 mT to 500 mT were measured through the holographic interferometry method. The influence of magnetic field on the interference fringes was analyzed and eliminated by introducing a polarizer to the test optical path. The mutual diffusion coefficients of [mmim](3)MP/CH3OH and [mmim] DMP/H2O exponentially increased with increasing magnetic field but decreased with increasing [mmim] DMP mass fraction. Predictive mathematic models for the [mmim]DMP/CH3OH and [mmim]DMP/H2O systems were created by correlating the experimental data, and total relative deviations below 5% were both obtained. At a fixed concentration, the magnetic-enhanced efficiency of [mmim]DMP/CH3OH was greater than that of [mmim]DMP/H2O. Application of magnetic field proved to be an effective method to enhance the mass transfer of the liquid phase in the absorber. (C) 2019 Elsevier Ltd. All rights reserved.