We investigate the synthesis of two-dimensional surface plasmon vortex power flows by a plasmonic vortex lens excited
by oblique incident beams. It is shown that the plasmonic vortex lens can generate the off-centered vortex flows, the
centers of which are determined by the incidence angle of the excitation beam. The theoretical analysis of the
relationship between the off-center shift and the incidence angle is described. Furthermore it is shown that the
illumination of two unparallel coherent incidence beams produces dual-vortex flows by the coherent superposition.