The Arctic， as one of Earth's “Three Poles”， is abundant in resources and serves as a key focus in global change research. Changes in sea ice within this region are highly significant for the opening of navigational routes and the preservation of ecological systems. However， existing 3D GIS systems lack the capability to directly visualize irregular grid data， thereby restricting their capacity to support Arctic passage information services. To address this technical challenge， this study proposes a method to automatically transform irregular grid data into regular grid data. Additionally， a Cesium-based three-dimensional visualization system for sea ice data has been developed， enabling the automatic loading and visualization of long-term irregular grid sea ice data within a 3D virtual Earth environment. Performance evaluations demonstrate that the proposed method achieves high levels of accuracy and efficiency， and the developed system effectively and intuitively depicts Arctic sea ice changes， providing critical ice condition information to support ship navigation planning.