Management support system for building or civil structure

The invention provides a management support system which can realize comparison between a building or a civil structure as a management object and design data with high precision. This management support system is provided with: a storage device (130) in which design data is stored, said design data being data corresponding to a building information model (BIM) or a civil engineering information model (CIM); a measurement device (110) that measures a building or a civil structure in a non-contact manner in a real space and generates point group data; and a computer device (120) that processes the design data and the point group data, in which the computer device (120) generates surface data representing the surface of the shape represented by the point group data, compares the design data with combined data obtained by combining the point group data and the surface data, and calculates the design data by comparing the combined data with the design data. The design data is updated on the basis of the result of