The invention discloses an intelligent relaying system and an intelligent relaying method implemented by an unmanned aerial vehicle, belonging to the technical field of unmanned aerial vehicle application. The system comprises a wireless signal generation device, a flying type relaying service device and a wireless network device. The flying type relaying service device is in wireless connection with the wireless signal generation device and the wireless network device, and comprises the unmanned aerial vehicle and an onboard wireless network relay, wherein the wireless signal generation device is suitable for generating wireless signals in a certain scope; the flying type relaying service device is suitable for realizing relaying amplification through the wireless signals, and the unmanned aerial vehicle is capable of intelligently controlling own flight status according to the needs of the wireless network device. According to the invention, the wireless network device needed to access to a near-end wireless network is tracked in real time by the unmanned aerial vehicle, the wireless signals of a remote wireless transmission network are amplified in a manner of relaying through the onboard wireless network relay, and thus, a fast, reliable, steady and high-efficiency network access service is provided for a tracking target.