The invention provides an apparatus of sensing blood flow to sense a target organ of a user, the apparatus includes: a sensor, sensing the target organ by a specific wavelength light source, to obtain a pulse information and a saturation of peripheral oxygen (SpO2) a comparing unit, determining a blood flow status in the target organ by comparing the pulse information and the SpO2 with a reference value, and and a monitor, displaying a location of the target organ, and the blood flow status.本發明提供一種血液流動感測裝置及其方法,用於感測一使用者之欲量測區,其中包含:一感測器,藉由至少一特定波長光源對量測區進行發射,並接收量測區之反射光,以擷取一脈搏資訊與一血氧濃度資訊;一比較單元,根據上述脈搏資訊與血氧濃度資訊,並與一參考值作比較,以判斷量測區內之血液流動狀態;以及一顯示單元,顯示量測區之位置、以及血液流動狀態。10‧‧‧血液流動感測系統11‧‧‧感測器111‧‧‧脈搏資訊感測器112‧‧‧血氧濃度資訊感測器12‧‧‧比較單元13‧‧‧顯示單元D‧‧‧量測區
