Optical Metasurface is an ultrathin optical design composed of subwavelength meta-atoms, which have demonstrated unprecedented capabilities in manipulating light propagations. After tremendous researches during past decade, its working principle has be extended from initial resonance of meta-atoms to non-resonant geometric phase and dynamic propagation phase. The constituent material was extended from the metal to dielectric to further reduce the loss, and make the high efficiency devices more applicable. By now, numerous functionalities have been realized. This session focuses on the cutting edge progresses on the metasurface technology towards novel applications, including but not limited to metalens imaging, meta-optical devices, meta-holograms and encryptions, meta-spectrometers, 3D-diplays, etc.