A ship interior outfitting design system using virtual simulation technology is developed to address the limitations of the traditional ship interior outfitting design system, including lack of intuitiveness, poor interaction and long design iteration cycles. 3ds Max has been used for 3D modeling, and the realism of the model and the real-time nature of the system are considered through refined modeling and optimization processing. A virtual environment based on the Unreal Engine 4 is established to complete the model import, material allocation, collision setup and lighting optimization, together with efficient connection to a MySQL database through C++ plug-ins. The system integrates the functions of resource management, dynamic adjustment of design schemes and perceptual engineering evaluation, and develops diversified interactive logic through blueprint technology to improve the user experience. The test results show that the system can accurately present the three-dimensional model and material effects of the interior outfitting design, realize the function of real-time interaction and perceptual engineering evaluation, thereby meeting the basic requirements of ship interior outfitting design. Users can intuitively adjust design schemes and obtain visualized evaluation feedback through the system. The system has good intuitiveness and operability, enhancing the presentation quality of the design scheme and user experience. It provides an innovative solution for the ship interior outfitting design.