The present invention relates to an ultrasonic diagnosis apparatus and a power supply device. The ultrasonic diagnosis apparatus comprises: an ultrasonic host including a pluggable main battery pack; a backup power supply device including a plurality of pluggable backup battery packs, for powering the ultrasonic host; and a trolley for carrying the ultrasonic host and the backup power supply device; wherein a specification of each of the plurality of backup battery packs is identical to that of the main battery pack.