Abstract: A wireless communication device and a power saving method are provided. The wireless communication device includes a wireless communication circuit, a system chip, a wake-up controller, and a beacon communication circuit. The system chip is electrically connected to the wireless communication circuit. The system chip is configured to successively make the wireless communication circuit and the system chip sleep in response to a power saving demand and configured to receive a wake-up signal to successively awake the system chip and the wireless communication circuit. The wake-up controller is electrically connected to the system chip. The wake-up controller is configured to send the wake-up signal to the system chip. The beacon communication circuit is electrically connected to the wake-up controller. The beacon communication circuit is configured to send a beacon packet periodically according to a transmission period.