Burner low-temperature flames were established on a Powling burner with a diethyl-ether/toluene/air (toluene content in fuel by liquid volume: 0.5 vol% and 1.0 vol%) at an equivalence ratio of 2.0, under the atmospheric pressure, in order to understand the low-temperature ignition inhibition mechanism by toluene. Aromatic hydrocarbons and unsaturated aliphatic hydrocarbons measurement are preformed by a liquid and gas-chromatograph. The temperature in the low-temperature flames were measured using a fine thermocouple. The formation of aromatic hydrocarbons in the yellow column is promoted by toluene addition. Toluene addition retarded the cool-flame appearance and reduced the distance between cool and blue flames. The similarity to burner low-temperature flames and a compression ignition low-temperature flames can be confirmed also here.