A universal modular connector includes a base and a transforming module. The base has a first opening thereon, and the base further has an optical component therein. The transforming module has a circuit board, a plurality of connection terminals, a first signal transforming integrated circuit (IC), and at least one fiber optic connector therein. The transforming module receives external electronic signal through the connection terminals, and transforms the received electronic signal into optical signal via the first signal transforming IC. The transforming module is connected with the base through the first opening, and the optical component of the base receives the transformed optical signal sent by the fiber optic connector of the transforming module. Therefore, the universal modular connector transmits the optical signal externally to an electronic device via the optical component.