The invention relates to an electrical equipment external discharging ultraviolet detection and analysis method and device. The electrical equipment external discharging ultraviolet detection and analysis method is characterized by comprising the following steps that a, an ultraviolet imager is used for conducting non-contact detection on external discharging of electrical equipment, and an ultraviolet discharging image is formed; b, the obtained ultraviolet discharging image is subjected to grey processing, and a color picture is converted into a binary grey level image; c, the binary grey level image is subjected to mathematical morphological filtering, and a clear ultraviolet light spot binary grey level map is acquired; d, a Fourier description subalgorithm is used for conducting quantification comparison on the filtered clear ultraviolet light spot binary grey level map and images in a preset typical discharging ultraviolet binary image map library one by one; e, according to the comparison result, a judgment result of the types of the external discharging of the equipment is given out. According to the electrical equipment external discharging ultraviolet detection and analysis method and device, the types of the external discharging of the equipment can be judged in the ultraviolet detection process of the electrical equipment, and the scientificity, the accuracy and the reliability of ultraviolet detection and diagnosis on site are improved.