An eye tracking method includes: constructing, by a processing circuit, an eye model； analyzing, by the processing circuit, a first head center position, according to a plurality of first pupil shape information and the eye model, wherein the plurality of first pupil shape information correspond to a plurality of first gazing vectors； capturing, by a camera circuit, a first image of the eye； analyzing, by the processing circuit, a determined gazing vector, according to the eye model and the first image； and adjusting, by the processing circuit, the first head center position according to an actual pupil shape information group and a plurality of simulated pupil shape information groups.一種眼球追蹤方法，包含：由處理電路建立眼球模型；由處理電路依據多個第一瞳孔形狀資訊以及眼球模型分析第一頭部中心位置，其中多個第一瞳孔形狀資訊對應於多個第一凝視向量；由攝影電路捕捉眼睛的第一影像；由處理電路依據眼球模型以及第一影像分析判定凝視向量；以及由處理電路依據實際瞳孔形狀資訊組以及多個模擬瞳孔形狀資訊組調整第一頭部中心位置。
