Due to a significant position of Taiwan private consumption expenditure in GDP, this article therefore introduced IS-LM and AD-AS model analysis to understand how will change in consumption expenditure affect change in GDP, interest rate and price, in which it introduced quarterly official statistics of Taiwan over the last 26 years (1982-2008) and used SPSS statistical analysis method to prove a relevance in between, which becomes the research motive of this article, with results of empirical analysis proved to be consistent with IS-LM model and complete AD-AS Keynesian model.