A Raman detecting chip, a method of fabricating the same and a Raman spectroscopy detecting system. The Raman detecting chip according to the invention includes a substrate, a plurality of nano-wires and a plurality of three-dimensional dendritic metal nanostructures. The substrate has an access. The access has a circular opening and a circular bottom surface. The plurality of nona-wires are formed on the circular bottom surface and protrude upward. The plurality of three-dimensional dendritic metal nanostructures are formed on a plurality of tops of the plurality of nanowires and extend beyond the circular opening. |