Home Network System (HNS) is a system which provides value-added services by orchestrating household appliances and sensors. In previous work, we have proposed Cloud HNS, which is a new type of HNS based on the concept of Cloud. In this research, we propose IRaaS (Infrared as a Service) that realizes networking control of household appliances controlled by infrared signal, as a Cloud HNS’s appliance control service. IRaaS consists of two components, IR Proxy and jRemocon. IR Proxy mediates appliance control on Cloud, and jRemocon transmits an infrared signal in a home. With these components, IRaaS can provide appliance control functions as a service on Cloud. Then, we design and consider elements required for implementing IRaaS, and we also create and test a prototype. Based on these results, we confirm the sufficiency of functions of IRaaS.