An object information acquiring apparatus is used which includes: a light source controller that controls radiation of light from a light source； a detector that detects an acoustic wave generated by an object irradiated with the light； an information processor that acquires characteristics information on an inside of the object using the acoustic wave； and a scan controller that changes a relative position between the detector and the object, this object information acquiring apparatus further including: a power source that supplies electricity for use by the object information acquiring apparatus； and a power source controller that controls activation timings for the light source controller and the scan controller so as to prevent a current value of a current flowing through the object information acquiring apparatus from exceeding an ampacity of the power source.
