Provided are an ultrasound or photoacoustic probe, an ultrasound diagnosis system using the same, an ultrasound therapy system, an ultrasound diagnosis and therapy system, and an ultrasound or photoacoustic system. The ultrasound or photoacoustic probe, according to one embodiment of the present invention, includes: a first transmitting and receiving unit transmitting an ultrasound or photoacoustic signal to an object and a second transmitting and receiving unit disposed to face the first transmitting and receiving unit, and receiving the ultrasound or photoacoustic signal passed through the object.