TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: In the methane oxidization reaction, at least 95 mole%, preferably 99 mole% of the methane is consumed. The water is removed from the mixed materials by: freeze drying; or cooling with liquid ammonia or washing with cold methanol, under the temperature of -20 degrees C to 0 degrees C, preferably -20 degrees C. The carbon dioxide is removed using ethanolamine aqueous solution or cold methanol, where the temperature of the cold methanol is -20 degrees C to 0 degrees C, preferably -20 degrees C. The carbon dioxide and water are removed by washing with cold methanol. At least a portion of the tail gas from step (i) is directly expelled from the Fischer-Tropsch reactor as a purge gas. A portion of the gas raw materials, the carbon dioxide and/or water removed by step (iii) is supplied to the methane oxidization reaction in step (ii) for conducting the methane oxidization reaction. Preferred Components: The single-cycle conversion rate of carbon monoxide under the controlled condition is 20-70%, preferably 40-60%. The controlled reaction condition in the Fischer-Tropsch reactor includes a reaction pressure of 10-30 Bar, preferably 15-25 Bar and a reaction temperature of 150-300 degrees C, preferably 180-250 degrees C. The total conversion rate of carbon monoxide under the controlled reaction condition is at least 80%, preferably at least 90%. The mole percentage of water in the gaseous materials re-introduced into the Fischer-Tropsch reactor is less than 0.01%. The volume percentage of carbon dioxide in the gaseous materials re-introduced into the Fischer-Tropsch reactor is 2% or less. The Fischer-Tropsch reactor is slurry bed reactor, fixed bed reactor, or fluidized bed reactor. The ratio of the resulting gaseous products to the fresh gas raw materials is 1-6, preferably 1-3. The ratio of the volume of hydrogen to carbon monoxide in the resulting gaseous products is 1-3, preferably 2. The ratio of the volume of water, oxygen and carbon dioxide to that of methane in the methane oxidization reaction is kept at 0-3:0-2:0-5:0-6. The amount of water present in the Fischer-Tropsch reactor is less than 5%.