According to one embodiment, an electronic device includes]: a connected device information management module; a connected device information sending module; an operation state sending module; and a connected device operation module. The connected device information management module is configured to manage function information of an external device connected to the electronic device. The connected device information sending module is configured to send the function information of the external device to a portable terminal in response to a transmission request from the portable terminal. The operation state sending module is configured to send an operation state of the electronic device with respect to the external device in response to the transmission request from the portable terminal. The connected device operation module is configured to perform a functional operation of the external device specified by a request sent from the portable terminal.