A power supply connection device, including: an electric connector, a shell connected to the electric connector, and at least one socket disposed on the shell, and also including: a modulation/demodulation module, a control module and a data acquisition module, wherein the control module and the data acquisition module are separately connected to the at least one socket. The control module is used for controlling the ON or OFF of the socket according to a control signal. The data acquisition module is used for acquiring the ON or OFF state of the socket and operational parameters. The modulation/demodulation module is used for receiving a signal transmitted via an electric power line, extracting the control signal from the received signal and transmitting same to the control module, and receiving the data acquired by the data acquisition module, modulating the data acquired by the data acquisition module and then transmitting same to the electric power line. The power supply connection device provided in the present application can not only perform remote monitoring on the state of the power supply connection device, but can also perform remote control on the power supply connection device.