Exosomes derived from prostate cancer cells can directly or indirectly promote the growth and metastasis of prostate cancer cells. It was found that it can be used as a marker for diagnosis and prognosis evaluation of prostate cancer, and participate in the clinical treatment of prostate cancer, such as targeted therapy, drug resistance assessment, tumor vaccine preparation,etc. With the development of various studies and technological progress, exosomes will play a huge role in the diagnosis and treatment of prostate cancer.