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Augmented reality has been increasingly used for the last 10 years. Real and virtual world combination supported by this technology has made augmented reality become an essential element for computer generated data integration in real-world. Museum augmented Reality Viewfinder is an interactive system that allows visitors to overlay computer generate contents onto sites and archaeological exhibitions in real time. As the person move the camera around, the position and orientation of the camera perspective is tracked, allowing the overlaid material to remain tied to the physical world. This paper describes concept, architecture and technology inside the Museum augmented Reality Viewfinder, image processing, rendering and PTZ control techniques are also detailed.