Polycystic ovarian syndrome (PCOS) is an imbalance of endocrine hormones with a group of symptoms that occur in the reproductive age of females. It is diagnosed by androgen excess and ovarian dysfunction. Many pharmacological-based drugs and treatments are available, however, the effectiveness of existing therapies is less. Yet no cure for PCOS, but symptoms can be managed with medications and lifestyle modifications. Hence, an alternative treatment method is needed for a complete cure. Currently, much clinical evidence has revealed that Acupuncture (AP) and Electro-acupuncture treatment (EAT) are effective treatments for regulating reproductive hormone levels, normalizing testosterone, reducing ovarian cysts, enhancing ovulation, and weakening insulin resistance in normal and obese women with PCOS. Further, β-endorphin has a more crucial role in PCO, AP, or EAT, which may alter the formation of β-endorphin. The mechanism of AP and EAT for PCOS has not been widely reviewed so far. A good understanding of the AP and EAT would be helpful in women with PCOS. This chapter aimed to overview the probable mechanisms and experimental evidence-based data of acupuncture treatment on PCOS in animal models and human patients. We hope that the chapter study will contribute to a better understanding of the PCOS and AP treatment.