In order to study the impact of the coordination mechanism of fiscal and monetary policy on the economy, this paper, under the framework of new Keynesian dynamic stochastic general equilibrium (DSGE), introduces six shocks including monetary policy shock, public fiscal policy shocks (labor income tax shock and capital tax shock), inter-temporal consumption shock, labor supply shock and production technology shock. With the parameters calibrated estimate, it analyzes the effects of various shocks on economic fluctuations. As a conclusion, labor supply shock, tax policy shock and monetary policy shock have different effects on different types of households. Both labor income tax shock and capital tax shock increase capital stock and improve social welfare instead of reducing output and consumption. The variance decomposition shows that production technology shocks and monetary policy shocks explain most of the information about endogenous variables fluctuations and the inter-temporal consumption shock has some explanatory power to consumption, capital stock, labor supply and welfare. At the same time, capital tax shock has certain explanatory power to bond stock.