Abstract: A grid is a large-scale resource sharing technology, which increases resource utilization by distributed collaboration. Grid service discovery is the basis and prerequisite for using the grid, but grid service discovery in the recall and precision rates can't reach a satisfactory level. I}his paper proposed the concept of service behavior, and used the semantic technology to note it, On this basis, a semantic annotation service behavior based grid service discovery algorithm was proposed. Experiments show that this algorithm is better than the traditional method. It has higher accuracy and recall rate, and stability.

Key words: Grid, Resource, Grid service, Service discovery