In order to effectively solve the instable problem of wireless signal transmission in modern architecture, the scheme of using coaxial cable to transmit 2.4GHz wireless signal is proposed. Firstly, the feasibility of wireless signal which transmit in coaxial cable is analyzed and measured. Next, the former result is compared with the typical values of propagation attenuation of wireless signal spreading in free space. Finally, the better transmission performance of WIFI signal is verified, which spreading in coaxial cable compared to free space in modern architecture.