This paper describes a novel system of a water-sparged aerocyclone (WSA) for fine particles (FP) removal in the air stream from a coal-fired power plant. The effects of operating parameters, including inlet FP concentration (C-0(FP)), water jet velocity (U-L), and air inlet velocity (U-G) on the removal efficiency of FP (REFP) were investigated. The change of morphology, particle size distribution, and content of heavy metals of the FP samples before and after removal in the WSA were also compared. The results show that the RE of the FP and PM2.5 can reach as high as 99.36 and 99 %, respectively, under optimal conditions. A regression removal model of RE(FP = )85.08 x Re-G(0.0187) x Re-L(0.0037) x (C-0(FP)/rho(FP))(0.0048) was proposed to predict REFP, and the calculated REFP by the model is in agreement with experimental data with deviations of +/- 0.5 %. This new technology provides an alternative approach for FP removal from exhaust gas and exhibits significant potential for industrial application.