By uses of contract theory, based on owner's and contractor's expected utilities, this paper creates three kinds contract incentive models, they are 2 levels limited liability Contract, cost-plus fixed percentage fee Contract and share distribution formula Contract. 文章应用契约理论建立基于业主和承包商期望效用的两种水平的有限责任合同、按固定份额分成合同、按约定公式分成合同等三类合同模式的激励模型。