The "Haiyuan" modular underwater rescue robot is designed and developed to meet the needs of marine and offshore rescue missions. Its design concept is based on addressing the uncertainties in marine rescue operations, thus employing a modular design. The robot's tool modules can be expanded as needed, and the main unit reserves multiple modular interfaces to facilitate the addition of multifunctional applications. It can be independently set up in the rescue command room of an offshore rescue center, ready for immediate deployment. During emergency rescue missions, multiple toolkits can be installed on-site as required, allowing for rapid deployment and maximizing the effectiveness of the rescue equipment. To address the issue of power loss during turning at full speed with the traditional four-point horizontal layout, we have adopted a layout scheme with four horizontal points and three vertical propellers, and innovatively designed a variable steering rudder propulsion system. This design allows the product to switch quickly from full-speed propulsion to precise control after reaching the target point, thereby improving the robot's operational performance. In terms of appearance, we have adopted biomimetic lines inspired by marine organisms, combining fluid dynamics with aesthetic design. The front independent modular visual information group and ring-shaped lighting add a sense of technology to the product, giving it a refreshed appearance. This attempt at appearance design changes the ruggedness of traditional rescue equipment, making a significant step towards integrating product development with industrial design. The design and functionality of the "Haiyuan" modular underwater rescue robot provide a new solution for marine rescue operations, equipping it with higher adaptability and efficiency to handle various complex environments and tasks.Feasibility: The modular design allows for customizable tool modules and easy expansion, making it adaptable to various marine rescue scenarios. The pre-reserved modular interfaces on the main unit facilitate the addition of different functionalities, ensuring the robot can be tailored to specific mission requirements. Operability: The robot can be independently set up in the rescue command room of an offshore rescue center, ensuring it is always ready for immediate deployment. During emergency rescue missions, toolkits can be quickly installed on-site, enabling rapid configuration and deployment, which enhances the operational readiness and response time. Functionality: The innovative propulsion system, combining four horizontal and three vertical propellers with a variable steering rudder, ensures efficient navigation and precise control. This design minimizes power loss during turning at full speed and allows the robot to switch swiftly from high-speed movement to fine-tuned maneuvering, enhancing overall operational performance. Structural Integrity: The biomimetic design inspired by marine organisms not only improves the robot’s hydrodynamics but also integrates aesthetic appeal with functional design. The robust structure ensures durability and reliability in harsh underwater environments, while the advanced visual information group and lighting system enhance situational awareness and operational efficiency.Formal Beauty: The robot's design incorporates biomimetic lines inspired by marine organisms, giving it an elegant and streamlined appearance. This not only enhances its visual appeal but also improves its hydrodynamic performance. The combination of smooth curves and sleek lines provides a harmonious and modern aesthetic. Functional Beauty: The robot's innovative propulsion system, which includes four horizontal and three vertical propellers with a variable steering rudder, ensures efficient navigation and precise control. This design element not only serves a practical function but also contributes to the robot's overall aesthetic by showcasing the integration of advanced engineering solutions in its form. Material Beauty: High-quality, durable materials are used in the construction of the robot to ensure its reliability in harsh underwater environments. The choice of materials reflects a commitment to both functionality and aesthetics, with finishes and textures that convey strength and sophistication. Craftsmanship Beauty: The meticulous attention to detail in the robot's construction highlights the craftsmanship involved in its design. Each component is carefully engineered and assembled, reflecting precision and expertise. The seamless integration of various modules and interfaces showcases the high level of workmanship. Technological Beauty: The advanced visual information group and ring-shaped lighting system not only enhance the robot's operational capabilities but also add a futuristic and high-tech aesthetic. These features demonstrate the robot's cutting-edge technology, merging form and function in a visually striking manner.The design of the "Haiyuan" modular underwater rescue robot enhances the efficiency and safety of marine rescue operations, reducing casualties and property losses while safeguarding marine life and property. Its flexible modular design and advanced technology enable it to handle various complex rescue missions, increasing the adaptability of the entire rescue system. Additionally, its technological appeal and aesthetic design raise public awareness and attention towards rescue operations, fostering societal support and investment in marine rescue efforts, thus promoting social progress and development.1. The "Haiyuan" modular underwater rescue robot enhances marine rescue safety through modular design and advanced technology, reducing risks and casualties. 2. Its health benefits include minimizing health risks for rescue personnel by ensuring accuracy and safety through real-time monitoring and autonomous navigation systems. 3. The robot's ease of use is demonstrated by rapid deployment and user-friendly interface design, simplifying rescue operations and improving efficiency and response times.