Abstract: As an island county, flood and typhoon defense is a very important issue in the field of emergency management. Among them, digital platform is a more effective means. At present, the digital platform for flood and typhoon defense also plays a certain role, but in practice, there are also problems such as the lack of timely update of basic information and the single content of warning reminders. In this paper, based on the island, facing the disaster situation in Daishan County of Zhejiang Province, combining with the advantages and disadvantages of the existing platform, the use of digital technologies such as video analysis, IOT monitoring, basic information statistical display, security code transfer, typhoon path and intensity change monitoring in flood prevention, to establish a more convenient and practical operation command system and standardization process, for a limited time to maximize efficiency of all kinds of information, to ensure accurate prevent and respond to disasters.