The invention discloses a design method and the application of a wave-absorbing/wave-transmitting metasurface based on a tantalum nitride material. A metasurface with dual wave absorbing/transmittingcharacteristics is designed. The metasurface with the dual wave absorbing/transmitting characteristics is composed of three parts, namely a tantalum nitride MA structure arranged at the top of the metasurface, a Teflon dielectric plate with the dielectric constant thereof to be 2.2 and arranged in the middle of the metasurface and a band-pass FSS arranged at the bottom of the metasurface. The metasurface is used for coating a microstrip antenna. The metasurface serves as the coating of the antenna and is of a double-layer structure. The two layers of the metasurface are respectively composed of a tantalum nitride periodic structure and a frequency selective surface structure which are arranged on the two sides of the dielectric plate respectively. A final data result shows that when the wave absorbing/transmitting metasurface designed by the invention is used as the coating of the antenna, the radiation characteristic of the antenna is almost not changed. The maximum reduction amount of the single-station RCS of the antenna can reach 20 dB or above, and the reduction bandwidth of the antenna can reach 5 GHz-19GHz. Meanwhile, the single-station RCS and the double-station RCS of theantenna are obviously reduced within a wide angle range.