The development trend of the emerging marine industry affects the development of the marine economy, to explore the development trend and the independent innovation path of the emerging marine industry, the added value of the emerging marine industry as the dependent variable, R&D personnel and R&D funds as the intermediary variables, innovation efficiency as the explanatory variable were selected, a development trend measurement model was established by using the Data Envelopment Analysis (DEA) method, and the independent innovation path and development trend of the emerging marine industry through the established model was analyzed. Results show that the four independent innovation paths of technological capability, technological management capability, technological strategy, and network capability have a positive incentive effect on the development of emerging marine industries, and technological capability has a higher incentive for the development of emerging marine industries. Based on the results of empirical analysis, this study proposes strategies to promote the development of emerging marine industries, such as enhancing public awareness of emerging marine industries, improving long-term mechanisms for the development of emerging marine industries, and enhancing the independent innovation capabilities of emerging marine industries.