A heart sound signal / heart disease or cardiopathy distinguishing system includes a signal receiving unit and a signal processing unit. The signal receiving unit receives a heart-sound signal including a plurality of heart-sound frequency. The signal processing unit includes a first calculation unit, a filter unit and a second calculation unit. The first calculation unit performs a specific function calculation X=cAlnA on the heart-sound signal to generate a first calculation signal, wherein c can be any value or function value, A=A if A &ne 0 A=R(R &ge 1, R is Real number) if A=0. The filter unit filters the first calculation signal to generate a filtering signal. The second calculation unit performs a transformation on the filtering signal to generate data corresponding to an image plot.
