Recent experiments of parity-violating electron scattering (PVES) make it possible to pin down the strangeness electromagnetic form factors in the nucleon. In my talk, I will present a theoretical calculation of strangeness　electric and magnetic form factors from the clover N_f=2+1 lattice QCD simulation. Our lattice results are consistent with experimental values, and our errors are an order of magnitude smaller. I also present preliminary results for the strangeness parton moments in the nucleon.