Using the water of lignite as gasification agent, this paper mainly studies the influence of microwave and isothermal gasification on the syngas production and H-2/CO ratio to obtain the maximum possible amount of high-quality syngas. The results show that microwave heating produced syngas had an immensely superior performance over conventional heating. The total gas yields of 1,000 W microwave gasification is 1.75 times more than that of the 1,000 degrees C isothermal gasification. Moreover, the values of H-2/CO ratio obtained from microwave gasification was higher than 1,000 degrees C isothermal gasification.