This article presents a reprogrammable hologram based on 1-bit coding metasurfaces, which enables real-time, high-efficiency, and full-control holographic imaging. The metasurface consists of unit cells that can be switched between '1' and '0' by controlling diodes. The proof-of-concept experiments demonstrate that multiple desired holographic images can be generated in real time using a single metasurface. The proposed reprogrammable hologram offers advantages over conventional holograms, including high spatial resolution, low noise, and high precision. It also provides higher transmission or reflection efficiency due to the suppression of unwanted diffraction orders. The metasurface hologram is fabricated using a standard printed circuit board process and validated through experiments at microwave frequencies. The results show that the holographic images of 'LOVE PKU! SEU! NUS!' can be generated with high quality and clarity. The reprogrammable metasurface hologram can be adapted to different observation distances, improving image quality through dynamic reprogramming. The system achieves an overall efficiency of ~60% and a signal-to-noise ratio of ~10. The reprogrammable metasurface hologram can be extended to support multiple bits and both phase and amplitude modulations, enabling more advanced and versatile devices. The work demonstrates the potential of reconfigurable and programmable metasurfaces for future intelligent devices in various applications such as microscopy, display, security, data storage, and information processing.This article presents a reprogrammable hologram based on 1-bit coding metasurfaces, which enables real-time, high-efficiency, and full-control holographic imaging. The metasurface consists of unit cells that can be switched between '1' and '0' by controlling diodes. The proof-of-concept experiments demonstrate that multiple desired holographic images can be generated in real time using a single metasurface. The proposed reprogrammable hologram offers advantages over conventional holograms, including high spatial resolution, low noise, and high precision. It also provides higher transmission or reflection efficiency due to the suppression of unwanted diffraction orders. The metasurface hologram is fabricated using a standard printed circuit board process and validated through experiments at microwave frequencies. The results show that the holographic images of 'LOVE PKU! SEU! NUS!' can be generated with high quality and clarity. The reprogrammable metasurface hologram can be adapted to different observation distances, improving image quality through dynamic reprogramming. The system achieves an overall efficiency of ~60% and a signal-to-noise ratio of ~10. The reprogrammable metasurface hologram can be extended to support multiple bits and both phase and amplitude modulations, enabling more advanced and versatile devices. The work demonstrates the potential of reconfigurable and programmable metasurfaces for future intelligent devices in various applications such as microscopy, display, security, data storage, and information processing.