A simulation device comprising: a first model configured to calculate a first vehicle characteristics parameter; a second model configured to calculate a second vehicle characteristics parameter to transfer energy without converting the energy; and an interface model configured to perform conversion calculation of the first vehicle characteristics parameter and the second vehicle characteristics parameter, wherein the first vehicle characteristics parameter comprises a current, a voltage, a torque, and a rotation speed which are physical quantities related to vehicle driving force, characterized in that : the second vehicle characteristics parameter comprises a heat flow , a temperature , excitation force , and a displacement speed which are physical quantities related to a loss, wherein a vibration model and a heat model arranged in the second model are included, wherein the interface model comprises an excitation force/displacement speed calculation means which constructs an output to the vibration model for simulating vibration from output information of the first model and a vibration energy calculation means which calculates vibration energy from a vibration state, and wherein the heat flow is obtained by subtracting the vibration energy from loss information in the first vehicle characteristics parameter obtained from the first model . a first model configured to calculate a first vehicle characteristics parameter; a second model configured to calculate a second vehicle characteristics parameter to transfer energy without converting the energy; and an interface model configured to perform conversion calculation of the first vehicle characteristics parameter and the second vehicle characteristics parameter, wherein the first vehicle characteristics parameter comprises a current, a voltage, a torque, and a rotation speed which are physical quantities related to vehicle driving force, characterized in that : the second vehicle characteristics parameter comprises a heat flow , a temperature , excitation force , and a displacement speed which are physical quantities related to a loss, wherein a vibration model and a heat model arranged in the second model are included, wherein the interface model comprises an excitation force/displacement speed calculation means which constructs an output to the vibration model for simulating vibration from output information of the first model and a vibration energy calculation means which calculates vibration energy from a vibration state, and wherein the heat flow is obtained by subtracting the vibration energy from loss information in the first vehicle characteristics parameter obtained from the first model . the second vehicle characteristics parameter comprises a heat flow , a temperature , excitation force , and a displacement speed which are physical quantities related to a loss, wherein a vibration model and a heat model arranged in the second model are included, wherein the interface model comprises an excitation force/displacement speed calculation means which constructs an output to the vibration model for simulating vibration from output information of the first model and a vibration energy calculation means which calculates vibration energy from a vibration state, and wherein the heat flow is obtained by subtracting the vibration energy from loss information in the first vehicle characteristics parameter obtained from the first model . <EOS>