The guideline issued by the Fisheries Agency prohibits fishing-boats from evacuating to the offing. While the present fishing insurance almost insure fishing-boats hit by tsunami, it doesn't insure life during suspension at all, the fishermen bear big burden economically. Therefore many fishermen evacuated fishing-boats to the offing to protect them, but we find some problem fishermen don't have enough knowledge of tsunami. In this study, we practice the survey of fishermen's consciousness and actual fishing-boat's evacuation, and we build rules of fishing-boat's evacuation and communication method, to promote fishermen's correct knowledge of tsunami and to evade evacuation on dangerous situation.