Monetary policy decision-making is an ignored issue in macro economic mainstream theory. This paper carries on a theoretical and empirical research innovatively focusing on the basic issues. The main findings are: monetary policy decision-making demonstrated the evolution of the“quantity, price, quantity, price, and quantity”. A liquidity analysis path is embedded in this evolution, and this path shows that the“price”and“quantity”are essentially uniform due to the liquidity adjustment. Regression to the path of liquidity analysis is a logical start to rethink the relationship between money and economy, which means that it is necessary and possible to rethink the relation between money and economy in a unified framework. Based on the above findings, the paper innovatively constructed a“converged”new framework for generalized monetary policy decision-making, including three levels of goals, analysis and tools. Based on the above theory, this paper studied the decision-making logic at operational level, formed the analyzing chain. As for the core content,namely the liquidity analysis, this paper proposed an“ART”framework.