In the service-oriented software environment, interactions between components are highly dependent on the exposed service interfaces. Therefore, designing an appropriate service interface is essential. In this paper, we aim to perform a comparative evaluation on three different approaches to service interface design, i.e. method-centric, message-centric and resourcecentric. The evaluation is peformed systematically based on a list of selected evaluation criteria. It is expected that the evaluation results may assist software architects to understand the differences between approaches and adopt the approaches wisely in the service interface design.