A　device　that　can　couple　propagating　light　into　surface　plasmon　polaritons　(SPPs)　focused　into　a　small　region　is　highly　desired　for　on-chip　photonics　applications　(e.g.,　energy-harvesting,　sensing,　etc.).　However,　current　technologies　suffer　from　large　device　footprint,　low　working　efficiency,　and　insufficient　light-manipulation　freedom.　Here,　a　generic　approach　for　designing　plasmonic　lenses　to　generate　predesigned　vector　SPP　vortices　with　high　efficiencies　is　established.　Constructed　with　a　set　of　meta-atoms　exhibiting　tailored　reflection　phases　and　polarization-conversion　capabilities,　the　devices　can　convert　normally　incident　circularly　polarized　light　into　predesigned　vector　SPP　vortices　with　high　efficiencies,　due　to　both　phase　and　polarization　matching.　As　the　illustrations,　this　study　experimentally　demonstrates　directional　SPP　conversion　(coupling　efficiency:　35%;　utilization　efficiency:　98%)　and　SPP　focusing　effect　at　the　wavelength　of　1064　nm,　with　two　meta-couplers　in　stripe　and　arc　shapes,　respectively.　Finally,　a　ring-shaped　meta-coupler　is　designed/fabricated,　and　the　generation　of　a　vector　SPP　vortex　with　significantly　enhanced　efficiency　as　compared　to　previous　schemes　is　experimentally　demonstrated.　The　results　pave　the　way　for　realizing　on-chip　plasmonic　devices　to　efficiently　utilize　SPPs　with　minimal　footprints.