To provide an indoor thermal environment analysis method in which an analysis time is short, and analysis accuracy is high.SOLUTION: An indoor thermal environment analysis method includes: a step S5A of performing numerical fluid dynamics of a clean room with supply air temperature of a circulation air conditioner as a boundary condition using an indoor model; a step S6 of determining whether or not cascade control is to be executed; a step S7 of performing simulation of the cascade control using an air conditioning facility model; a step S8 of updating the supply air temperature used as a boundary condition in a next numerical fluid dynamics; and a step S9 of determining whether or not processing is to be finished.SELECTED DRAWING: Figure 2
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