In industry, especially those activities moving towards longer supply chains and facing increasingly uncertain, the issue of value at risk (VaR) under the Taiwan's TFT-LCD Industry is an important topic. This study apply the value at risk of portfolios into supply chain management and using Monte Carlo simulation, which be useful to evaluate the value at risk of different supply chain from Taiwan's TFT-LCD manufacturers. Our results show that the payoff and value at risk on the chain between single and group/group strategic partner and see different chain type of companions whose values at risk are same or not. It is found that the value at risk of the stock's price does depend on the types of supply chain. These results also have directly effects on the establishing partner relationship within their supply chain and thus promote the customer service level to compete.