A biological object image-capturing and treatment system includes a micro detection and treatment device. The micro detection and treatment device includes a plurality of signal transmitting and receiving elements arranged as an array, wherein adjacent at least two signal transmitting and receiving elements transmit signals or receive signals during different periods. When performing an image-capturing procedure, at least one signal transmitting and receiving element transmits a first power signal and, when performing a treatment procedure, at least one signal transmitting and receiving element transmits a second power signal, wherein a power of the first power signal is different from a power of the second power signal.