This paper is second part of the modeling research of creep behavior of single crystal superalloy, a dislocation-based creep model is devoted to creep predictions. The constitutive equations describe the relation between macroscopic strain rate and shear strain rate on slip systems derived from the slip theory and the activity of various slip systems has been modeled by the research of microscopic mechanisms. Results obtained by the present approach are compared with creep date with various temperature and load in different orientations, including superalloys DD3 and CMSX-4, to demonstrate the validity and applicability of the proposed model.