The submarine cable integrated online monitoring system is mostly used in major offshore projects such as offshore oil platforms and offshore wind farms. In order to realize the remote data release function of the submarine cable online monitoring system and make data transmission more efficient and reliable, this study deeply analyzes the structure model and communication process of the IEC60870-5-104 protocol. On this basis, we propose a set of submarine cable online monitoring data based on the protocol and explain the design ideas and level model of the system. Simultaneously, we propose the corresponding solutions for the two key issues of dynamic configuration and mass data transmission. Finally, the feasibility of the scheme is verified by an application example of a marine engineering project.