Abstract: This is a review of the 2019 academic annual symposium of engineering investigation specialized committee of the Chinese Institute of Seismology and the 4th symposium on development strategies of marine engineering geology. From May 10 to 12, 2019, this symposium was successfully held in Ocean University of China. The symposium is mainly organized by the Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, and co-organized by Institute of Disaster Prevention Science and Technology and Division of Earth Sciences of National Natural Science Foundation of China. The symposium gathered more than 120 participants from 42 organizations including domestic universities, research institutes and the industries with theme of "Survey and prevention of ocean earthquake and its secondary disaster".Through 11 invited lectures and 9 oral lectures, this symposium reflected 4 aspects on the theoretical accumulation and academic achievements of marine engineering geology in China for several decades. In a harmonious atmosphere, all the attendees discussed the issues around symposium theme. In this symposium, new academic sparks were collided, and new academic thoughts were produced. It plays a positive role in making it clear that what is the mechanism of ocean earthquake and its secondary disaster and that how to prevent them. What's more, it provides a chance for marine engineering geologist to exchange their thoughts and share their research progress.