We investigate relationships between application level Quality of Service (QoS) for Internet of Things (IoT) and that of underlying networks. We particularly focus on intelligent IoT devices, such as drones and robots, and network technologies supporting them. We assume our target use cases as IoT services controlled by remote servers or terminals operated by human. In this service, delayed information causes unstable behavior of the IoT devices. In this paper, we propose that delayed information that is not suitable for the feedback of the device control shall be discarded in a network. With our prototype systems and a manipulator as an example of the intelligent IoT device, we show effectiveness our proposed scheme and mention the need of Quality of Control (QoC) instead of QoS for these systems.