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 (401, 402) 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 (401, 402) 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 (401, 402) 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 (401, 402) 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 (401, 402) 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 (401, 402) 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.