Abstract: The problem how to coordinate the supply chain with revenue-sharing contract under asymmetric information is studied, with a new model developed relevantly. In this model, the supplier as the leader has the decision-making right for wholesale price and revenue-sharing proportion, while the retailer as the follower has just the right to conceal the information on marginal cost and determine the ordering quantity. Discusses the supplier's optimal revenue-sharing strategy in case the retailer conceals the marginal cost, with a comparative analysis made under symmetrical information at the same time. A numerical simulation is done and the result shows that the supplier's optimal revenue-sharing strategy to spur retailer will pay a price for the unobservability of retailer's private information and reduce his/her profit, while the retailer can gain from that.