A balance assistance system includes a rotating member, a first driving unit, a sensing module and a processing unit. The first driving unit is connected to the rotating member. The first driving unit is configured to drive the rotating member to rotate. The processing unit is electrically connected to the first driving unit and the sensing module. The processing unit receives a sensing signal from the sensing module. The processing unit determines a current behavior mode from a plurality of behavior modes according to the sensing signal. The processing unit controls the first driving unit to adjust a rotating speed of the rotating member according to the current behavior mode.一種平衡輔助系統，包含一轉動件、一第一驅動單元、一感測模組以及一處理單元。第一驅動單元連接於轉動件。第一驅動單元用以驅動轉動件轉動。處理單元電性連接於第一驅動單元與感測模組。處理單元自感測模組接收一感測訊號。處理單元根據感測訊號自複數個行為模式中決定一目前行為模式。處理單元根據目前行為模式控制第一驅動單元調整轉動件之轉速。
