An electronic apparatus, comprising: a display configured to output text; a voice collector configured to collect a user voice; a first communicator configured to transmit the user voice to a first server and to receive, from the first server, text information corresponding to the user voice; a second communicator configured to transmit the received text information to a second server and to receive, from the second server, response information corresponding to the text information from the second server, wherein the response information is a control command; and a controller configured to control the display to display a system response corresponding to the response information received from the second server, wherein the system response is a UI screen, wherein the controller is further configured to, in response to the second communicator receiving the response information, control the display such that a voice command guide (420, 440) that provides a user with words to use to perform voice control of the electronic apparatus related to the system response, said voice command guide (420, 440) including at least one voice command that is receivable by the voice collector and is related to a specific operation that can be performed by voice control in response to the outputted system response, wherein the voice command guide is displayed separately to the UI screen of the system response, and wherein the voice command guide (420, 440) comprises different voice commands according to whether the electronic apparatus is in a current situation where the electronic apparatus displays a broadcast program or whether the electronic apparatus is in a current situation where the electronic apparatus executes a web browsing application. a display configured to output text; a voice collector configured to collect a user voice; a first communicator configured to transmit the user voice to a first server and to receive, from the first server, text information corresponding to the user voice; a second communicator configured to transmit the received text information to a second server and to receive, from the second server, response information corresponding to the text information from the second server, wherein the response information is a control command; and a controller configured to control the display to display a system response corresponding to the response information received from the second server, wherein the system response is a UI screen, wherein the controller is further configured to, in response to the second communicator receiving the response information, control the display such that a voice command guide (420, 440) that provides a user with words to use to perform voice control of the electronic apparatus related to the system response, said voice command guide (420, 440) including at least one voice command that is receivable by the voice collector and is related to a specific operation that can be performed by voice control in response to the outputted system response, wherein the voice command guide is displayed separately to the UI screen of the system response, and wherein the voice command guide (420, 440) comprises different voice commands according to whether the electronic apparatus is in a current situation where the electronic apparatus displays a broadcast program or whether the electronic apparatus is in a current situation where the electronic apparatus executes a web browsing application.