Marine renewable energy (MRE) has the advantages of being green, clean, and renewable, and plays an important role in reducing carbon emissions in the marine sector. MRE equipment and technologies are crucial for the efficient development and utilization of MRE. This study introduces the development status of MRE equipment and technologies in China and abroad, analyzes the international development trend of MRE equipment and technologies, and examines the problems existing in the development of MRE equipment and technologies in China. Specifically, the development levels of different types of MRE equipment and technologies are uneven, the comprehensive utilization of multiple energy resources is inadequate, and China still lags behind the advanced international level regarding the reliability, operation, and maintenance of the MRE equipment and technologies. To improve equipment reliability, reduce power generation costs, and ensure safety and environmental protection, we suggest that China should formulate a medium- and long-term plan that supports the sustainable and innovative development of MRE equipment and technologies, develop core technologies of MRE equipment, explore application scenarios for the integrated development of multiple energy resources, and attract more investment to accelerate industrial development.