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Ag nanoparticles with dipole and quadrupole plasmon are employed as dual-resonant nanoantenna to enhance both “receiving” and “emitting” fields resonantly. Strong enhancement of photoluminescence (PL) and highly efficient plasmon-assisted Förster energy transfer between CdSe quantum dots are demonstrated by employing Ag dual-resonant nanoantenna and micro-PL spectroscopy. The collaboration effect of quadrupole and dipole plasmon of Ag dual-resonant nanoantenna could find applications in plasmonics such as biosensoring and optical information processing.