The present invention discloses a multimedia device capable of processing a recognized speech-based command. In one embodiment, the device may include a memory to store at least one application therein; an application manager for executing any of the at least one application stored in the memory; and a controller configured to receive from the application manager a list of at least one recognized speech-based command that can be executed by the executed application, wherein the controller is configured: to control a network interface module to transmit any speech-based data received from an outside and the list to the server; and to control the executed application or execute a function non-specific to the currently-executed application, based on a feedback result value received from the server via the network interface module.