Aportable length measurement device is disclosed. The length measurement deviceincludes a measurement device including a measurement string, a lengthdetecting device and a recovery device.一種可攜式長度量測裝置,該可攜式長度量測裝置包括一量測線材、一長度感測器及一回復機構。1‧‧‧手持式移動裝置11‧‧‧容置空間2‧‧‧可攜式長度量測裝置21‧‧‧量測機構22‧‧‧計算機構4‧‧‧嵌入式系統