Abstract: Under the background of world energy shortage and carbon emission reduction targets, with the progress of marine and geothermal energy development technology, the potential of offshore geothermal energy has attracted more and more attention. The distribution of hot spots in the development of offshore geothermal resources in the world, as well as the advantages and disadvantages of the utilization of offshore geothermal resources were analyzed. The status quo and key technologies of offshore geothermal resources exploration were summarized, including offshore geothermal utilization strategy, geothermal exploration technology, geothermal resource evaluation technology, geothermal utilization technology and the environment impact evaluation technology, ect. It is pointed out that there are many challenges in the development and utilization of offshore geothermal energy in China, such as weak basic data, insufficient innovation of key technologies, poor autonomy of core equipment, and imperfect incentive policies, etc. At last, the corresponding development suggestions are given.