The invention discloses an intelligent anti-lost 
system and method. The 
system comprises an anti-lost device, a 
Bluetooth communication module, an alarm module, a Wi-Fi module, a 
button battery and a central controller. The 
Bluetooth communication module, the alarm module, the Wi-Fi module, the 
button battery and the central controller are all arranged on the anti-lost device. The anti-lost device is connected and communicated with a mobile terminal through a communication protocol. In a short-distance monitoring condition, only a low-power 
Bluetooth working mode is started, and in a long-distance monitoring condition, the low-power Bluetooth working mode is preferentially started, and a Wi-Fi working mode is started when the 
Bluetooth communication range is exceeded or false alarms and 
alarm failure occur due to unstable signals, so that power is saved and the service life of equipment is prolonged, the effective distance of monitoring is increased, and the anti-lost device in a safe distance can be effectively and accurately monitored. In addition, when a distance between a 
mobile phone and the anti-lost device is beyond the safe distance, the alarming of the anti-lost device and the 
mobile phone end is supported at the same time, and the mentioned bidirectional alarm mechanism can comprehensively inform a user.