Abstract: A smart home access device, comprising a transmission modulation-demodulation module which demodulates a digital transmission signal downloaded via a cable into a video or audio digital signal and an Ethernet signal and for outputting respectively, or also modulates the Ethernet signal by the cable to upload; and in particular, also comprising an Ethernet remote control extension processor which receives and parses the Ethernet signal downloaded by the transmission modulation-demodulation module so as to extract a control signal therefrom, or receives the control signal and encode same into an Ethernet signal for uploading to the transmission modulation-demodulation module; further, also comprising an Ethernet exchange module which exchanges and transmits the downloaded Ethernet signal to at least two Ethernet interfaces, one of the Ethernet interfaces being the interface with the Ethernet remote control extension processor.