development of Mobile device augmented reality tour application for Ramayana story on Wat Prakaew wall, which promotes the Ramayana stories on Wat Phra Kaew’s wall. The user takes a photo of the wall with the application on a smartphone or a tablet connecting to the application’s server via the internet. When the photo is matched with one in the database, the server sends the corresponding video clip back to be played on the mobile device. This application applies an image recognition technique and augmented reality technique to present the multimedia with more attraction. The experiment results show that the matching algorithm with extracting the painting’s descriptors in the database in advance improves the processing latency by a factor of 6X. Additionally, the matching accuracy and the system response time depend on the mobile device’s camera specification.