In the economically developed coastal regions and the big island area, there occurs frequently a variety of weather disasters associated with typhoons, heavy fogs and severe convection. Collection of marine meteorological data in real time is essential for improving the model prediction and thus weather services in the marine and coastal areas. To achieve autonomous system deployment and automatic measurement of marine meteorological parameters, a marine meteorological observation technique has been developed based on a solarpowered unmanned marine vehicle (UMV) and is named the Marine Weather Observer (MWO). A detailed description of this technique and its preliminary results of one experimental case during 1-6, April 2018 are presented in this paper.