The invention discloses a segmenting method of transformer substation equipment infrared image interest areas. The method comprises the steps of: firstly, carrying out an SIFT transformation on an obtained infrared thermogram I(x, y), and obtaining an initial characteristic point set P={p1, ..., pn} and a corresponding characteristic subset F={ f1, ..., fn}; secondly, carrying out matching on initial characteristic points, and obtaining characteristic point clusters; then carrying out matching on the characteristic point clusters, and obtaining characteristic point cluster sets; and finally segmenting the infrared thermogram I(x, y) based on the characteristic point cluster sets, and obtaining the interest areas of the infrared thermogram I(x, y) of the transformer substation equipment. The invention further discloses a segmenting system of the transformer substation equipment infrared image interest areas. According to the invention, the interest areas of the infrared thermogram of the transformer substation equipment are automatically segmented, so that the processing difficulty of subsequent fault analysis in a transformer substation infrared temperature monitoring process is lowered, and the automatic level of the electric power equipment infrared image detection technology is improved.