To provide a method of improving combustion efficiency to quicken temperature rise and to achieve benefits that generation of contaminated material is reduced and chemical energy is more sufficiently converted into heat energy.

This method is applied to the combustion of a simple substance, and comprises determining an environmental temperature in combustion environment of the simple substance first (11), setting a first temperature higher than the environmental temperature (12), uniformly heating the simple substance to the first temperature (13), minimizing temperature difference between an outer edge and the inside of the simple substance, simultaneously supplying a supporting gas, and heating the supporting gas to a second temperature (14), supplying the supporting gas to the combustion environment (15), and igniting the simple substance (16). The rise of the combustion temperature of the simple substance can be quickened by applying this procedure, thus the combustion comes closer to complete combustion, further the combustion efficiency can be improved, and the contaminated material can be reduced.