Abstract: Objectives To enhance ship magnetic stealth capability under modern naval warfare conditions, this study conducts a systematic analysis of the generational evolution and systemic trends of ship degaussing technology in response to the challenges posed by nT-level magnetic detection. Methods Based on the “Material-Energy-Control” three-generation technology model, the development trajectory of ship degaussing technology since the 1980s is summarized and compared. The study focuses on the technical evolution, energy efficiency, and control precision of passive degaussing, active compensation, and current systemic approaches. Results The findings indicate that the passive degaussing phase (1980s~2000s) achieved a 30%-50% reduction in static magnetic field intensity through low-magnetic-permeability steel and structural optimization. The active compensation phase (2000s~2020s) employed fixed degaussing coils to control magnetic field fluctuations within ±50 nT, with a precision of ±0.1%, though constrained by high power consumption. In the current systemic phase (2020s-), the integration of flywheel energy storage, batteries, and supercapacitors, combined with intelligent regulation, enables magnetic signature suppression exceeding 90%. Technically, the flywheel unit provides 5 MW/10 s pulse output with a 60% reduction in volume; solid-state batteries overcome low-temperature degradation (-40 °C); and superconducting technology achieves a 45% weight reduction. Conclusions Ship degaussing technology is rapidly evolving from single-function approaches to multi-source coordinated systems, and from static configurations to intelligent regulation. The hybrid energy storage system—comprising flywheels, solid-state batteries, and supercapacitors—has become the mainstream direction for next-generation ship magnetic stealth, marking a fundamental shift toward systemic, high-precision, and energy-efficient degaussing solutions, laying a foundation for advanced stealth capabilities in future naval platforms.