Utilizing the wide band performance of terahertz spectrum has attracted great attention in developing wireless communication system beyond Gbps. This paper describes a 0.14 THz band wireless communication system with 10 Gbps transmission data rate. This system is based on super-heterodyne structure. IF signal is processed with digital 16QAM modulation, which is converted to RF frequency with Schottky diode sub-harmonic mixer. Working in 133.8 GHz-137.4 GHz band(BW=3.6 GHz), 10 Gbps wireless signal transmission has been achieved successfully over a distance of 500 m with output power of 0 dBm, and transmission error bit rate less than 10-6.