Properties of Bluetooth frequency hopping sequences, including Hamming correlation property, property of balance, multiple-access property and capacity of FH communication system, are analyzed. Some of the bluetooth FH sequences will overlap seriously if they are synchronized in time, so solutions to this problem are presented. The best one among them is, in one district, that addresses A27-0 of any two Bluetooth devices should be different from each other in three parts: A27-19, A18-14, 12, 10, 8, 6, 4, 2, 0 and A13,11, 9, 7, 5, 3, 1, the more the different bits' number of the Bluetooth addresses is, the better it is. The different bits should be distributed as scattered as possible.