Seafarers were the main human resources in the maritime field and maritime transport. Due to a decrease in awareness of the value of seafarers, the voluntary irregular workers were appeared and will be a serious impact on job stabilization. Therefore, this study examines differences in occupational consciousness and legal system for seafarers and derives plans to improve the phenomenon of irregular workers. Firstly, differences in seafarer laws were analyzed and the actual conditions of the industry were investigated. There is no difference in employment type when the supply of seafarers and the demand of the carrier are the same or when the demand is large. But when the supply of seafarers is greater than the demand, differences according to employment type will occur. A survey was conducted preferences and perceptions according to the employment type. There will be some voluntary non-regular workers due to insufficient information of employment types and avoidance of long-term seagoing service on the ships. In addition, as the avoidance of long-term seagoing service on the ships and the employment of foreign-seafarers are elements of threat on the jobs of Korean seafarers. Therefore, some policy support will be required such as improvement of the quality of seafarers, protection of human rights, and a systematic approach to the role of buffer between classes. Therefore, this paper suggested policies for job stabilization such as improvement of job awareness, preparing of job stabilization system, improvement of awareness of the interim settlement of severance pay, and necessity of the employment connection of seafarers job.