[en] Highlights: • Solubility of SO₂ in [N₂₂₂₄][Met] was measured for the first time. • Low absorption enthalpy, the fast absorption process, recycling four times. • RETM was used to correlate the experimental data. -- Abstract: Solubility of SO₂ in [N₂₂₂₄][Met] was measured at temperature from 313.2 to 333.2 K and pressure up to 1.8 bar. The [N₂₂₂₄][Met] absorbed SO₂ at high speed and could be recycled for four times. The Reaction Equilibrium Thermodynamic Model (RETM) was used to correlate the experimental data, Henry’s constant (H), reaction equilibrium constant (K⁰), and thermodynamic properties (${{\mathrm{\Delta }}_{r}H}_m^0$, ${{\mathrm{\Delta }}_{r}G}_m^0$, ${{\mathrm{\Delta }}_{r}S}_m^0$, $\mathrm{\Delta }{H}_{\mathit{phy}}\mathrm{a}\mathrm{n}\mathrm{d}\mathrm{\Delta }{H}_{\mathit{chem}}$) were derived. Considering the absorption capacity and low absorption enthalpy, as well as the fast absorption process, [N₂₂₂₄][Met] is thought to be a promising absorbent to ordinary solvent as a desulfurizer.