Indoor positioning method and system based on Bluetooth

The invention provides an indoor positioning method and system based on Bluetooth, and the system comprises a positioning device and at least three Bluetooth beacons arranged indoors. The positioning device measures multiple groups of signal intensity values and distance values of any one or more Bluetooth beacons indoors, determining the value of a constant used in a distance measurement formula according to the multiple groups of signal intensity values and distance values to obtain a target distance measurement formula; the positioning equipment receives the broadcasts of the three Bluetooth beacons, and the three Bluetooth beacons are not collinear; the positioning equipment calculates a distance value between the positioning equipment and each Bluetooth beacon by using the target distance measurement formula according to the received signal intensity value broadcasted by each Bluetooth beacon; and the positioning equipment calculates the coordinates of the positioning equipment according to the distance