in this talk i will talk on our recent work on asymptotically hyperbolic einstein manifolds. i will present a proof for a sharp volume comparison theorem for asymptotically hyperbolic einstein manifolds, which will imply not only the rigidity theorem for hyperbolic space in general dimension but also curvature estimates for asymptotically hyperbolic einstein manifolds. in particular, as a consequence of our curvature estimates, one now knows that the asymptotically hyperbolic einstein metrics with conformal infinities of sufficiently large yamabe constant have to be negatively curved.