PURPOSE: To increase the degree of freedom in the combination of simulation processes exchanging data, to prevent the double occurrence of data and to cancel the trouble of data exchange by analyzing an input data file by means of format describing data, extracting a data part and setting it as the input of simulation in a next stage.

CONSTITUTION: Simulation information 42 obtained in the execution of simulation 41 at a simulation process 4 in a previous stage or a data file 43 obtained in sampling and the like is fetched into a simulation process 5 in the next stage, which is to be executed, as the input data file 51. The input data file 51 is inputted to a simulator 52 including an analysis part 52A and simulation 52B. The input data file 51 is analyzed based on information on format describing data 53, is set in simulation 52B, and the simulation is executed. Thus, simulation information 54 can be obtained.