As an important component of the digitalization and networking of ship systems, the design and application of the ship information network system have significant practical significance. In order to safely and efficiently utilize the network resources of the ship information network system and achieve data collection, analysis, and application at the whole-ship level, this paper conducts in-depth research on the control modes and control methods of the ship information network system, based on full consideration of the current research difficulties in this field. Accordingly, it standardizes the proposal of a hierarchical/cooperative control system framework for ship information networks, and effectively designs the process and method of information transmission. Under the premise of fully considering the connectivity, reachability, and observability of the ship information network system, it sets the information setting principles within the data transmission sequences of the system, and accordingly proposes transmission protocols for actuator and sensor data information within the ship information network system. Furthermore, this paper conducts pioneering research on the complete and confidential transmission of network information under the hierarchical/cooperative control system mode of ship information networks, and proposes an intrusion detection mechanism and a task process implementation opacity setting method against signal attacks on the ship information network system. The entire research process takes the distributed control unit, the core component of the ship information network system, as the object, and successively conducts design and research on its hierarchical/cooperative control strategy, information transmission protocol, and transmission methods that balance integrity and confidentiality. First, this paper studies the architecture of the ship information network system, which serves as the basis for analyzing its control structure. Further, based on the above analysis, this paper systematically analyzes the hierarchical/cooperative control system processes under both manual and remote operating conditions, thereby completing the analysis of the hierarchical/cooperative control system mode of the ship information network. At the same time, combined with the characteristics of the hierarchical/cooperative control system of ship information networks, this paper proposes a design method for the hierarchical/cooperative control strategy of distributed control units based on the principle of effect superposition, and takes the ship heading/anti-rolling composite task as an example to simulate and verify the effectiveness of the design method. Secondly, this paper studies the information transmission protocol under the hierarchical/cooperative control system mode of ship information networks, and proposes analysis methods for connectivity, observability, and reachability of the ship information network system under the constraint of communication resources. This serves as the design basis for the length of each data transmission sequence in the system, and further proposes transmission principles for actuator and sensor data information in the system. According to different physical characteristics, actuators in the ship information network system are divided into “stubborn” actuators and “compliant” actuators, which are used as the criteria for selecting the content of actuator data transmission sequences. Furthermore, according to the real-time data value of sensors in the ship information network system, this paper proposes a dual numerical index evaluation method for sensors based on sensor variation index and difference index, and according to this method, the corresponding sensor information is added to the corresponding data transmission sequences of the ship information network system. Under the premise of shortening the length of data transmission sequences, the above methods ensure the objective needs of the system for data collection, processing, and application, thereby optimizing system resources and improving system performance. Then, the complete information transmission technology under the hierarchical/cooperative control system mode of ship information networks is studied. In view of the closedness and vulnerability of the ship information network system, a corresponding intrusion detection mechanism is proposed. For signal attacks, this paper unifies the planning of related data information in the ship information network system according to the industrial model state language, proposes an intrusion detection method based on critical states, and gives the corresponding analysis algorithm. To verify the attack identification effect of the intrusion detection mechanism, this paper takes the heading/roll cooperative control task as an example to simulate and verify the effectiveness of the intrusion detection mechanism. The results show that the intrusion detection method can effectively detect abnormal data in the cooperative control system. Finally, this paper studies the confidential information transmission technology under the hierarchical/cooperative control system mode of ship information networks. Aiming at the communication modes of each distributed control unit in the ship information network system, this paper analyzes the possibility of information leakage in the task processes of the system, and uses opacity as the research basis for the confidentiality of the system. To this end, this paper proposes an implementation opacity mechanism based on a double-layer insertion function for the ship information network system. By calculating the corresponding safety-guaranteeing insertion function f_(IS) and permissibility insertion function f_(IA), the modification of command outputs of each distributed control unit is completed, thereby realizing the confidential setting of key task states of the ship information network system, and thus ensuring the protection of key information during the hierarchical/cooperative control process of the ship information network
