This paper studies the long-run relation between inflation rate and money growth rate of Taiwan from 1907 to 1986. Since the relevant monetary statistics of the earlier period are not available, we first construct the Miand WPI statistics for the period from 1907 to 1958. The constructed data ,together with the post-1959 official estimates, are then used in our empirical study. The emprical results show that, first, there was a one-to-one relation between inflation rate and money growth rate. Second, the causal ity tests show that money growth Granger-caused inflation while the reverse was not true. These results hold under pre-1931 gold standard period and the subsequent period of fiat monetary standard. In general, the results are consistent with the implications of the Quantity Theory of Money.