The invention provides a communication cable and a communication system. The communication cable comprises a sheath and a first cable layer and a second cable layer which are arranged in the sheath. The first cable layer comprises a data cable line, a first power line, a shielding cable line and a shaping member. The data cable line, the first power line and the shielding cable line are combined together and accommodated in the shaping member so that the first cable layer is enabled to be shaped into a cylindrical structure through the shaping member. The second cable layer comprises multiplesecond power lines and multiple control cable lines. Multiple second power lines and multiple control cable lines are twisted together around the first cable layer so as to wrap the first cable layer,wherein the pitch of the second cable layer is less than that of the first cable layer. The communication cable is stable in performance and long in service life and can realize multiple communication functions only through one cable so that establishing and maintenance of the communication system can be facilitated, the resource loss can be reduced and environment-friendly communication can be realized.