This paper adopts fixed effect model to analyze the effect of bank system and exchange rate volatility on industrial vertical integration. In evidence, we use Taiwan's nine industries and sample period is selected from 1981 to 2003. Empirical results show that real economic growth rate, the role of bank to financial system, the elasticity of import and real exchange rate fluctuations will influence each industrial vertical integration. These variables have different influence on industrial vertical integration according to different industries. The greater the real exchange rate fluctuation is, the more the water and electricity industry's vertical integration is. As the role of bank to financial system increases, the degree of vertical integration in water and elasticity industry also increases. But the conclusion on transport and communications industry is opposite.