We describe the use of chiral metal nanoparticle systems, as novel heterogeneous chiral catalysts for the asymmetric 1,4-addition of arylboronic acids to alpha,beta-unsaturated carbonyl compounds, as representative C-C bond-forming reactions. The reactions proceeded smoothly to afford the corresponding beta-arylated products in high to,excellent yields and outstanding, enantioselectivities, with wide substrate scope. Remarkably, the nanoparticle catalysts showed performance in terms of yield, enantioselectivity, and catalytic turnover that was superior to that of the corresponding homogeneous Metal complexes. The catalyst can be successfully recovered and reused in a gram-scale synthesis with lbw catalyst loading without significant loss of activity. The nature of the active species was investigated, and we found that Characteristic features of the nanoparticle system were totally different from those of the metal complex system.