This paper reports an integrated photoacoustic breast imaging system. Matching the optical fiber bundles with flexible transducer, an integrated photoacoustic excitationcouplingdetection system is formed, so compared with the traditional photoacoustic imaging system, the proposed system has the advantages of morphological adaptability, and can realize the photoacoustic imaging with large field of view. The imaging capability of the system has been investigated by sample and breast tumor imaging in vitro experiments, demonstrating the potential of this system for largescale clinical breast cancer screening.