Abstract:The network control system of ship power station is developing from layered, local to flat and global. Information security problems may directly lead to functional safety failures, and it is urgent to carry out credibility analysis and design. Aiming at the credibility problems such as functional safety and information security of the ship power station network control system, the credibility risks and design requirements are analyzed from the system, data and network, and the system credibility technology, data credibility design technology and network credibility design technology are put forward, ensuring the credibility of the ship power station network control system, providing technical support for the credibility analysis and design of the equipment network control system.