Abstract: Based on the characteristics of marine geological survey, a new mode of informatization for marine geological survey business was explored, and a supporting system was developed for the whole-process informatization of marine geological survey in the Xamarin framework and SignalR Web message interaction technology. The system integrated mobile data acquisition terminal with browser client and server, and established the whole-process information system of marine geological survey. A demonstration pilot of marine geological survey has been completed, which promoted effectively the informatization process of marine geological survey.