It is well known that in the gas-phase under light at room temperature, chlorine radical (Cl•) can abstract hydrogen of methane to form methyl radical (CH3•) in the radical chlorination of methane with chlorine (Cl2). Moreover, as the most readily available gas-phase oxidant, dioxygen (O2) has been already widely used in the conversions of methane (Figure , Table ), and especially CH3-OO• species could be formed from CH3• with O2 in the gas-phase. However, there are few reports to disclose how to convert CH3-OO• species to methanol or methyl ester exclusively, to prevent over-oxidations of methanol or methyl ester happening in the liquid-phase, and to make a chlorine catalytic system for the aerobic oxidation of methane under the radical reaction conditions.