Abstract: The supply chain members' decision models are built with the option contract between the contract market and e-marketplace firstly,after setting the pricing policy appropriately,the supplier can gain more advantage in the e-marketplace and profit from the contract market,which can also be an incentive to the retailer to order rationally and make the supply chain coordination realize the optimal pricing,capacity and order strategies in the equilibrium condition.In the end,according to different factors,the sensitivity of the decision models are simulated which confirms that option contracts can make the supply chain coordination be realized.

Key words: e-marketplace, option contract, supply chain, supply chain coordination