In 1997, the Asia currency crisis spread out from Thailand. Most Asia countries' currencies devalued. This study uses the Markov-switching model to investigate if the Asia currency crisis was self-fulfilling. In this study, we show that the crisis can not only be explained by the macroeconomics, and in particular Thailand, Philippine and South Korea were proven to be self-fulfilling in 1997, we also show that the Markov-switching model is the better model than linear model.