The photon extraction efficiency of the organic light-emitting devices (OLEDs) is considerably low because of the presence of various light-trapping modes. The power conversion efficiency of organic photovoltaics (OPVs) is also unsatisfactory because of the incomplete light absorption induced by the low diffusion length of the organic active materials which limit the thickness of active layer. An effective method to improve the efficiency of the organic optoelectronic devices is to use the metal plasmonic micro/nano-structures for regulating the light-field distribution. This review article summarizes the recent advances in light-field manipulation induced by the metallic subwavelength structures in organic optoelectronic devices. Furthermore, the principles and strategies for enhancing the light extraction in OLEDs and light harvesting in OPVs, are discussed in this study.