Interactive Video Platform intends to help people communicate with each other through Internet multimedia. Over the platform, users around the world may be linked together to interactively help each other solving their problems. In general, when a research based web prototype was opened to general public, it may often be paralyzed by too many users logged in. Thus, this paper proposes a generic implementation method: first converting the existing web hardware architecture to an IaaS cloud, then porting the application software to the IaaS cloud. Cloud computing architecture has better scalability, higher availability and lower cost-effectiveness. Therefore, when a cloud computing based interactive video platform has been completed, the system usually can provide flexible and reliable services to general public. In addition, since the proposed IaaS cloud approach is not limited or associated to any particular application or architecture, thus the proposed implementation method can be widely applied to convert most of research prototypes into real world application systems.