[Solution] This system is a system that analyzes bloodflow at a target blood vessel location by means of a simulation, and has: a fluid analysis unit whereby a computer applies computation conditions including boundary conditions pertaining to bloodflow to 3D shape data of the target blood vessel location, and determines state quantities of bloodflow at each position of the lumen of the target blood vessel location by means of computation； a 3D shape correction unit whereby a computer corrects 3D shape data by means of simulating a surgical treatment method and outputs the post-correction 3D shape data； and a comparative display unit that re-executes computation of state quantities by the fluid analysis unit on the basis of the post-correction 3D shape data, and displays the computation results after shape data correction in a manner so that comparison is possible with the computation results before correction.
