This paper discusses the econometric models construction procedures, including the data type of input, model specification and statistics test. The empirical studies of application of tourism demand was also be provided This paper also takes tourists of Japan in Taiwan for an example. Time series data from 1971 through 1994 include the number of tourists and the social-economic factors affecting the inbound tourist are used to test this model MAPE (Mean Absolute Percentage Error) is used to test the justice of the mode.