意向书、协议书与合同都属于经济文书,广泛应用于企业之间、社会贸易组织之间、个人之间。由于它们往往会出现在同一个合作项目中,而且在功能、写法和用法上有许多相同或相似之处,故很容易被混淆。笔者试从它们的涵义和特点入手进行辨析,归纳出它们的相同点和不同点,以期达到正确使用的目的。 LOIs, agreements and contracts are all economic instruments and are widely used among enterprises, social trade organizations and individuals. They tend to be confused because they tend to appear in the same cooperative project and have many of the same or similar features, wording and usage. I try to start from their meaning and characteristics of discrimination, summed up their similarities and differences in order to achieve the correct use of the purpose.