The invention discloses an article anti-loss method and system and electronic tag. The anti-loss method includes the following steps: an intelligent mobile terminal establishes a circular linked list according to the total number of electronic tags, the circular linked list includes the serial number and Bluetooth ID of each electronic tag and the article name corresponding to each electronic tag, all the electronic tags establish a Bluetooth connection according to the circular linked list to form an anti-loss network, the electronic tag with the smallest serial number detects a situation of Bluetooth connection with the electronic tags with other serial numbers in real time, and if a certain electronic tag cannot be connected, an article corresponding to the electronic tag is judged to be lost and an alarm is given. The intelligent mobile terminal is no longer an indispensable element in the anti-loss network, the practical range of the article anti-loss system is expanded, and the flexibility of the anti-loss network is improved. The electronic tags can also detect the state of the intelligent mobile terminal, and if the intelligent mobile terminal is lost, the electronic tag with the smallest serial number gives an alarm and prompt, thereby realizing mutual detection of the electronic tags and the intelligent mobile terminal and an alarm and prompt are given.