Based on integration and cointegration test findings, this paper constructs an error correction (ECM) model to evaluate the dynamic adjustment process of money demand in China in the reform period (1979 to 1990). The cointegration tests suggest that some long-run relationship exists among money demand, real income, price, and the real interest rate. The ECM model shows that the dynamic adjustment process of money demand maintains stable and significant relationships to most of its determinants.