A speech interactive control system, comprising: an external control device, an audio input/output device configured to accept audio input information from a user; and a display device configured to display an image; said external control device receiving audio input information from the user accepted by the audio input/output device, analyzing the audio input information, and obtaining, from a storage unit of the external control device or from an external server, related information relating to the audio input information, wherein if the related information is to be obtained from the external server, a respective search request is first sent from the external control device to the external server; characterised in that: said external control device further determining whether or not to include an image in response information to be provided to the user, based on contents of the obtained related information, and in a case of determining to include the image in the response information, outputting information including a URL of the image, to the audio input/output device, receiving a request from a display device, which is separate from the audio input/output device, as to the URL, and effecting control to display the image by the display device, by transmitting the image to the display device, wherein, in a case of having determined to include the image in the response information, part of the response information is output by audio from the audio input/output device, and wherein the audio input/output device outputs a message requesting permission for displaying the image on the display device as output from the audio input/output device, and wherein, in a case where the user permits display of the image on the display device, control is effected to display the image on the display device by the audio input/output device first sending an instruction to the display device to turn the power of the display device on, and thereafter sending an instruction to display the image to the display device. an external control device, an audio input/output device configured to accept audio input information from a user; and a display device configured to display an image; said external control device receiving audio input information from the user accepted by the audio input/output device, analyzing the audio input information, and obtaining, from a storage unit of the external control device or from an external server, related information relating to the audio input information, wherein if the related information is to be obtained from the external server, a respective search request is first sent from the external control device to the external server; characterised in that: said external control device further determining whether or not to include an image in response information to be provided to the user, based on contents of the obtained related information, and in a case of determining to include the image in the response information, outputting information including a URL of the image, to the audio input/output device, receiving a request from a display device, which is separate from the audio input/output device, as to the URL, and effecting control to display the image by the display device, by transmitting the image to the display device, wherein, in a case of having determined to include the image in the response information, part of the response information is output by audio from the audio input/output device, and wherein the audio input/output device outputs a message requesting permission for displaying the image on the display device as output from the audio input/output device, and wherein, in a case where the user permits display of the image on the display device, control is effected to display the image on the display device by the audio input/output device first sending an instruction to the display device to turn the power of the display device on, and thereafter sending an instruction to display the image to the display device. said external control device further determining whether or not to include an image in response information to be provided to the user, based on contents of the obtained related information, and in a case of determining to include the image in the response information, outputting information including a URL of the image, to the audio input/output device, receiving a request from a display device, which is separate from the audio input/output device, as to the URL, and effecting control to display the image by the display device, by transmitting the image to the display device, wherein, in a case of having determined to include the image in the response information, part of the response information is output by audio from the audio input/output device, and wherein the audio input/output device outputs a message requesting permission for displaying the image on the display device as output from the audio input/output device, and wherein, in a case where the user permits display of the image on the display device, control is effected to display the image on the display device by the audio input/output device first sending an instruction to the display device to turn the power of the display device on, and thereafter sending an instruction to display the image to the display device.