Emergency risk assessment provides a basis for offshore operators to identify hazards, reduce risks to an appropriate level and protect people from the impact of accidents. The aquaculture vessel will be affected by adverse natural conditions during navigation and operations, not only facing risks such as collision and grounding, but also encountering additional emergencies arising from engineering operations such as mooring operations and aquaculture farming. It is therefore necessary to carry out risk assessment for the emergencies it faces. Firstly, the characteristics of the aquaculture vessel is analyzed. Subsequently, the types, probabilities, causes, processes, and severity of potential emergencies throughout the whole process of the navigation and operation of the aquaculture vessel are examined based on these characteristics. Finally, a risk assessment of the emergencies faced by the aquaculture vessel is conducted to develop a FMEA worksheet by using the failure mode and effects analysis (FMEA) method. It provides valuable date decision support for emergency decision-making and emergency management system construction.