1. A thermal-fluid-simulation analyzing apparatus comprising: an execution unit that generates an analysis model using analysis conditions and that conducts a first thermal fluid simulation analysis based on the generated analysis model, the analysis condition being a condition in a thermal fluid simulation analysis according to which an air conditioning state in a predetermined space is simulated; an analysis-condition collecting unit that, when a predetermined period passes after the first thermal fluid simulation analysis by the execution unit, collects analysis conditions; a condition extracting unit that extracts a boundary condition from the analysis conditions that are collected by the analysis-condition collecting unit when the predetermined period passes after the first thermal fluid simulation analysis, the boundary condition being an analysis condition that has changed relative to a corresponding analysis condition used for the first thermal fluid simulation analysis; and a re-execution unit that selects a region corresponding to the boundary condition extracted by the condition extracting unit from regions of the analysis model generated by the execution unit, updates the selected region with the boundary condition, and conducts a second thermal fluid simulation analysis for the updated analysis model.