To provide a high performance and low cost system LSI by using a common model, sharing the model between different simulators and executing simulations of appropriate precision with the same model by an integrated simulation control method and by reducing a man-hour of configuring a large scale system LSI hardware/software coordination design environment and shortening a system LSI design period.

A simulator device has implemented interfaces capable of calling a block used in a one-chip simulation of a large scale system LSI from a control part of a different simulator, to thereby reduce a man-hour of simulator design. The implementation of debugging interfaces realizes a verification and analysis function for each purpose.