This paper describes the development of an electric appliance controller using an IoT system. The IoT system can configure and control its edge devices which are placed behind a Network Address Translator (NAT) using Wiki pages. These operations were realized by Bot Computing, a framework for Internet of Things (IoT). Any electric appliance can be controlled using the combination of Bot Computing and edge devices with an Infra-Red (IR) transmitter, if the appliance has the IR remote controlled function. We can program the power on/off time of any electric appliances, by writing a script on a Wiki page on the Internet, using Bot Computing. We can change the program anytime, anywhere. We also can control turning on or off the appliance anytime, anywhere.