Positioning method and system of vehicle-connected Bluetooth key

The invention discloses a positioning method and system of a vehicle-connected Bluetooth key. The positioning method comprises the following steps: constructing a rectangular coordinate system by taking the current location of intelligent vehicle-mounted equipment arranged on a target vehicle as an original point; determining a size coordinate set of the target vehicle in the rectangular coordinate system through coordinates of at least four locations in a plane external contour of the target vehicle; judging whether the coordinate of the current location of the vehicle-connected Bluetooth keymatched with the target vehicle belongs to a size coordinate set in the rectangular coordinate system, and setting that the vehicle-connected Bluetooth key is in the target vehicle if the coordinateof the current location of the vehicle-connected Bluetooth key matched with the target vehicle belongs to the size coordinate set in the rectangular coordinate system. Whether the vehicle-connected Bluetooth key is in the vehi