Systems and methods for operating an operational terminal and a server are provided. In various aspects, an operational terminal may transmit information regarding the operational terminal and a remote commander for controlling a device. A server may receive the information, and transmit display information and signal code information to the operational terminal. The display information may include information for displaying operational elements of the remote commander on a display screen. The signal code information may include control information corresponding to each of the operational elements. The operational terminal may display the operational elements on a display screen for selection by a user. Upon selection of a particular operational element, the operational terminal may transmit a control signal for remotely controlling an operation of the device, where the control signal may be transmitted in accordance with the received signal code information corresponding to the selected operational element.