Instrument management system and instrument management portable terminal

The invention provides an instrument management system and an instrument management portable terminal. The business process when one maintainer confirms the consistency of the actual instrument valueand the BAS instrument value is improved, and the efficiency is improved. An actual instrument value acquisition unit acquires an actual instrument ID and an actual instrument value from a smartphoneoperated by a maintenance person. A BAS instrument value acquisition unit acquires, from the PC, a BAS instrument value corresponding to the ID and the acquisition time of the actual instrument value.A storage unit stores the actual instrument value and the BAS instrument value in association with the ID. The difference value calculation unit calculates an actual instrument difference value, which is the difference between the actual meter value acquired this time and the actual meter value acquired last time, the BAS instrument difference value is the difference between the BAS instrument value obtained this time and