The debate of the relationship between inflation and unemployment is mainly based on the famous “Phillips Curve”. This curve was first discovered by a New Zealand born economist called Allan William Phillips. In 1958, A. W. Phillips published an article “The relationship between unemployment and the rate of change of money wages in the United Kingdom, 1861-1957”, in which he showed a negative correlation between inflation and unemployment (Phillips 1958). As shown in figure 1, when unemployment rate is low, the inflation rate tends to be high, and when unemployment is high, the inflation rate tends to be low, even to be negative.