A microcomputer-controlled double-probe system and the software for computing the electron temperature from the V-I curve measured with this system have been developed. At different discharge currents, gas pressures, ingradients of gas mixture and probe position of the 2kW CW CO2 laser, the measured average electron temperature and electron density are in the range of (1.7-3.2)eV and (0.62-1.36) ×1011cm-3 respectively. The E/N is about 2.0 × 10-16 V cm2.