Ship equipment and ocean engineering structure with high technology, high investment, high yield, high additional value, high risk characteristics, also need high safety and reliability. The equipment and structure serving in severe marine environment for a long term are mainly made of metal, so effective corrosion protection must be taken to them. The corrosion status of ship and ocean engineering structure was summarized, and the status and problem of corrosion protection technology are pointed out. The technology includes coating, cladding, electrochemical protection (sacrificial anode and cathodic protection technology), surface treatment technology, corrosion inhibitor, structural health monitoring and detection, lifetime evaluation, reliability evaluation. The trend of each method is described. Take the coating for example, the pursuit of high percentage solid, without (weak) solvent, water soluble, without heavy metals, high performance, multifunction, low surface treatment, save resources, smart and low cost is the international trend. Finally, some suggestions and measures are given.