The invention relates to a novel power network measurement and control system employing a power carrier technology. The novel power network measurement and control system comprises a central server, an electronic carrier generator and a plurality of power network measurement and control instruments, wherein an optical fiber is connected between the central server and the electronic carrier generator; and the electronic carrier generator and the power network measurement and control instruments are electrically connected with connection lines. According to the novel power network measurement and control system employing the power carrier technology, signal transmission of the system in a power carrier manner is achieved through the electronic carrier generator; the wiring cost is reduced; meanwhile, a carrier signal can be coupled through a transformer; and a communication circuit can also be isolated with a power-frequency heavy AC, so that the reliability of the system is improved. Moreover, an interference signal can be effectively filtered through a resonance network comprising a third capacitor and an inductor; the signal transmission stability is improved; meanwhile, the novel power network measurement and control system plays a surge protection role through a bidirectional diode; the back circuit is effectively prevented from being broken down by a high voltage; and the circuit reliability is improved.