Provided is a method for producing a cloned dog by enucleating an oocyte of a dog to produce an enucleated oocyte, transferring a somatic cell of the dog into the enucleated oocyte, carrying out electrofusion under optimized conditions to produce a nuclear transfer embryo, and transferring the nuclear transfer embryo into its surrogate mother. The method has the effect of producing a cloned dog with high efficiency, and thus can contribute to the development of studies in veterinary medicine, anthropology and medical science, such as the propagation of superior species, xenotransplantation and diseased animal models. In addition, the present invention has the effect of exactly researching production properties of the cloned dog by producing a female cloned dog for the first time, rather than the conventional male cloned dog.