TECHNOLOGY FOCUS - BIOLOGY - Preferred Components: The aerobic microorganism is a microorganism that grows and multiplies in the presence of hydrocarbons, additional nutrition and water.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The low temperature plasma reactor is a hollow cavity discharging reactor composed of a discharging electrode and a grounding electrode. The grounding electrode has two kinds of tube and board. The discharging electrode has a metal conductor having a discharging end point. The low temperature plasma reactor is applied with a positive direct high-voltage or a positive pulse high-voltage, where the voltage peak value of the positive direct high-voltage is 15-50 kV and the voltage peak value of the positive pulse high-voltage is 20-100 kV, and the pulse frequency is 50-300 times. The biological processing reactor is a biological cleaning tower or bio-filter tower or bio-trickling tower. The biological cleaning tower is used when the organic waste gas that is hard to degraded contains the sol particles. All the three towers can be used when the organic waste gas that is hard to degraded does not contain the sol particles.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The organic waste gas is the gas or aerosol having the organic compound that can be degraded and derived from coking, printing and dyeing, spraying, slaughtering and chemical industries, and the organic compound comprises polycyclic aromatic hydrocarbon, halogenated hydrocarbon, heterocyclic compound and organic nitrile compound. The easily degradable organic waste gas is an organic compound, which is processed by the low temperature plasma, easy to be degraded and easy to be dissolved in water and comprises low molecular organic acid, alcohol and/or ester compound. Preferred Method: The low temperature plasma is a strong oxidizing substance comprising ozone, hydroxide ions, hydrogen peroxide, oxygen ion and high-energy electron and produced based on electron having an energy less than 80 kJ/m3. The organic compound which is partially oxidized by the low temperature plasma is converted into the low molecular organic compound.