Provided is a repair-pipeldesig led-pipe measuring system for measuring the flange faces of a pair of flanges at both ends of a repair pipe or a designed pipe and obtaining spatial position data of the flange faces, the repair pipe being brought in a factory and repaired when a defect such as leakage occurs in a pipe used for carrying a liquid or a gas in ships, plants, and other places in order that the defective portion is reworked, and the designed pipe being made on the basis of a design in order that the error between the design and itself is checked. An object (2) to be measured such as a pipe or the like is set between a reference stage to which a position measuring device (3) previously invented by the present inventor for the purpose of another use is attached and a related stage which is processed to have an accurate positional relationship with respect to the reference stage and to which the position measuring device is attachable. The object to be measured is measured from both the reference stage side and the related stage side by using the position measuring devices, which the position measuring devices may be moved by connecting the reference stage with the related stage by a sliding mechanism. This accurately checks the positional relationship of the flanges at both ends of a pipe or the like.