1. A Bluetooth automatic connection method, comprising the following steps:enabling, by a first device, a Bluetooth function, to obtain Bluetooth device names in a communication range;
determining, one by one, whether the Bluetooth device names in the communication range contain a specific character, and if any Bluetooth device name contains the specific character, determining a Bluetooth device corresponding to the Bluetooth device name as a candidate Bluetooth device;
connecting, by the first device, to a first server, wherein the first server stores validly registered Bluetooth device information; according to the validly registered Bluetooth device information and names of candidate Bluetooth devices, determining whether there is a validly registered Bluetooth device in the candidate Bluetooth devices; and
if it is determined that there are validly registered Bluetooth devices in the candidate Bluetooth devices, the validly registered Bluetooth devices are ranked according to the strength of Bluetooth signals, connecting, by the first device, to the validly registered Bluetooth device having a strongest Bluetooth signal in the communication range.