中文摘要：

给出了一种基于OWL—S语言的服务描述以及服务的查找方法。该方法依据服务所必须满足的前置条件和后置条件作为判断服务匹配的准则，可以加快服务的匹配速度以及提高匹配精度，并在实际应用中证明了该方法的有效性。

英文摘要：

A method which used the description of the services based on OWL- S language and service searching is given. The method uses the pre - condition and post condition which the services must be met as a judge matching criteria, and this can speed up the matching of services and improve the matching accuracy, and prove the effectiveness of the method in the practical application.