This paper proposes an Internet-of-Things (IoT) Edge-Empowered Cloud System (called IoT Edge-Cloud) for the visual control of IoT devices in a user’s smartphone. This system uses the combination of existing technologies (e.g., DNSNA, SALA, SmartPDR, and PF-IPS), for DNS naming and indoor localization to support the visual control of IoT devices. For the visual control of IoT devices, the IoT devices register their auto-generated DNS names and the corresponding IPv6 addresses with the IoT Edge-Cloud. Each DNS name embeds an IoT device’s type (e.g., fire sensor, television, refrigerator, or air conditioner) and its location information, which is obtained through an Indoor Positioning System (IPS). With the DNS name, a user’s smartphone can display each IoT device and its location in an indoor place (e.g., home, office, and classroom), so that the IoT device can be located in the smartphone’s screen. Through performance evaluation, this paper proposes a localization scheme for a smartphone with average localization error of 1.08 meters. Also, it proposes a localization scheme for IoT devices (especially, at the center area in a testbed) with average localization error of 1.11 meters.