Development activities in the marine are steadily increasing, and its usage and development has been enlarged and diversified. For the effective evaluation of the marine environmental impact of the submarine cable project, which is one of the sea development activities, it is necessary to make evaluation that fully reflects the characteristics of projects and carry out continuous studies related to it. In this study, we examined the current status of submarine cable projects and the marine environmental impact of cable projects. As a result of reviewing the statement of the sea area utilization consultation, the number of projects related to submarine cable were 20 from 2012 to 2017. And they were concentrated on the South and West coasts, with 60% in the South Sea, 35% in the West Sea, and 5% in the East Sea. By the type of cable, the number of cable projects for communication and power were 9 and 8, respectively. The effects of the submarine cable project include the disturbance of the submarine bed, the resuspension of pollutants due to diffusion of suspended matter, and the noise during the process of burial, operation, and removal of cables. Specially, in case of power cable, it was found that electromagnetic field and heat radiation occurred in the operation phase. For effective impact assessment of cable projects, at the time of the current survey, it is necessary to survey the marine usage, protect area and the pollution status of the sediments of project area. At the stage of prediction of impact, the influence on the electromagnetic field should be taken into consideration as well as suspended materials dispersion. In case of mitigation measures, it is possible to minimize the impact by selecting the route based on the status survey results. In the case of monitoring, it is needed to select the survey point focusing on the route and to include the comparison of the photograph or video data of before and after projects.