A treatment system is provided and includes a treatment probe configured to perform treatment on a subject portion by irradiating the subject portion in a subject with light, an acoustic wave reception unit configured to receive an acoustic wave generated by irradiating the subject with light and to output a reception signal, an acquisition unit configured to acquire quantitative information about the subject portion based on the reception signal, and a display control unit configured to perform control to display the quantitative information about the subject portion.
