Abstract:HY-2A satellite, which is a only ocean dynamic environmental satellite on-orbit operation in the world, has four payloads of microwave sensing. It can synchronous measure the ocean dynamic environmental parameters, such as wind fields, significant wave height and sea surface temperature et al and measure real time data in China’s coastal waters. Therefore, HY-2A hold the balance predominance on monitoring storm tide, typhoon and tsunami et al. In our country, it is face to challenge to prevent and reduce ocean disasters. Therefore, The government is pay attention to the ocean disasters of prevention and reduction. In this paper, first of all, we have a comprehensive introduction on HY-2A satellite and its technical specifications and then we have a data validation. Finally, this is a detailed analysis that the application potential of HY-2A on monitoring typhoon and tsunami. The study results show that HY-2A can meet the need of ocean application and which can successfully capture typhoon and effectively monitor tsunami. In this paper, the next step will study on the data merge of HY-2A all payloads data in order to improve data resolution and to develop the high resolution of ocean dynamic environmental grid data, which can provide a reliable data source to ocean data assimilation model.