This paper proposes the application of the special theory of relativity by Professor Albert Einstein in monetary policy. The money energy (Em) is able to show clearly than with low amounts of inflation growth rates and with a high-speed rate for one year. We can generate a large amount of money energy in short periods of time. At the same time, with sustainable and constant expansion of the GDP in real prices growth rate (ΔGDPr) together with a large consumption growth rate (ΔC) with moderate and controlled amounts of money supply growth rates (ΔMS). We can generate a large amounts of money energy (Em) materialized in its value domestically (in the Purchasing Power Parity PPP) and internationally (the exchange rate) in a period of one year. The money energy (Em) requests the uses of two variables: The mass of inflation (Mi) and the money speed Cm2.