The Internet of things is an important part of the new generation of information technology and represents the latest achievements in the development of the world's information industry. IoT technology makes ships intelligent. It is emerging technology that has been proposed in the past 20 years. Internet-based IoT integrates with many of its sensor processing and processing functions, drawing attention in all areas. Recently, it has been widely applied in many fields such as intelligent transportation, smart cities, smart industries, smart homes, and intelligent agriculture. Nowadays, it has also been used in shipping industry. The ship network is an important application of LAN communication network technology on ships, which can provide information exchange capabilities of various equipment, communication device, and personnel in ship. This paper presents a review of the Internet of things layer architecture, ship area network architecture in the field of marine environment protection and monitoring.