To carry out the engine control suitable to the circumstance condition of the running area.

A parameter prescribing area settled based on the circumstance as the standard is displayed on an area table 34. When an area deciding part 24 finds the area the own car position belongs to an area signal is sent to an engine ECU 10. And a circumstance adaptable control parameter to be a control parameter decided corresponding to the parameter prescribing area, and to give the operating condition adaptable to the circumstance condition in the area is obtained from an area parameter table 16. The engine ECU 12 controls an engine 2 by using the obtained parameter. In the limit area where the town parts exist, for example, an ignition timing to suppress the engine output is adapted as the circumstance adaptable control parameter, in order to suppress the generation of the exhaust gas.