This study systematically introduces the elastic and elastoplastic modeling procedure within the framework of ordinary state-based peridynamics.On account of that the current developed two-dimensional ordinary state-based peridynamic models for elastic solid are inconsistent and peridynamics is essentially a three-dimensional theory,we attempt to determine the one and only two-dimensional model,then unify the two-dimensional model and three-dimensional model in a uniform formula only with different coefficients for elastic solid.