For sailing ships are sailing in the process of online monitoring of sailing ships without GPRS signalleads to the ground state of shipping problems, this paper adopts the core control ARM chips BGS67A STM42F372RC and satellite wireless chip as the platform, carrying on design and research of the sailing ship online monitoring system. Firstly, the overall structure design of online monitoring system of ship voyage is given. Then, the structure of the hardware software is designed.. Finally, the real-time data test proved that the monitoring system has the characteristics of strong practicability, high stability, 24 hours continuous monitoring and so on..