A drive condition, which is used to determine a SOC management plan, is collected from each of road sections and is cumulatively memorized in a durable memory medium. When a remaining charge amount of a battery reaches a lower limit standard value or an upper limit standard value at a certain location, a candidate control section is defined around and includes such point. The candidate control section is defined to extend a predetermined distance forward and backward from such point. The drive conditions stored for the candidate control section are used to determine the SOC management plan that controls the remaining charge amount of the battery to be controlled within a standard range. When the vehicle enters the candidate control section, the drive control of a power source in the vehicle is performed according to the SOC management plan for the candidate control section.