Optical metasurfaces, as artificially designed two-dimensional photonic materials based on micro-nano structures, can finely control the physical parameters of light fields, such as phase, amplitude, and polarization. When applied to light-emitting devices, the light field manipulation induced by optical metasurfaces enables precise regulation of the device's light-emitting properties, which has garnered widespread attention. We focus on the fabrication processes of optical metasurfaces and their application in light field manipulation within light-emitting devices. We introduce common micro-nano fabrication techniques for optical metasurfaces, provide an overview of the phase control mechanisms of metasurfaces, and summarize the recent research progress on the application of optical metasurfaces in light-emitting devices. We discuss the manipulation effects of optical metasurfaces on device emission characteristics, such as emission color, emission direction, emission polarization, and emission efficiency. Finally, we look forward to the future development and application prospects of optical metasurfaces and light-emitting devices based on optical metasurface light field manipulation.