Bluetooth is a progressive technology used for mobile ad-hoc network (MANET) for wireless nodes. Basic network in Bluetooth is called piconet, there could be multiple piconets in Bluetooth that are connected with a common node called relay. Relay plays an important role in the network, because it uses different hopping pattern for different piconets. Relay node has extra responsibility, which is forward data from one piconet to other. The mobility and degree of relay node affects the performance of the network. The problem in ad-hoc network is the node stability and reliability. As in Bluetooth all the communication is synchronized so relay has to switch for communication into different networks, most frequent movement of relay increase control overhead in the network. The mechanism for selection of relay should be simple and effective. A stable node should be selected as relay that increases the reliability and stability of the network. In this paper we consider the problem of designing an efficient mobility based relay selection and unnecessary relay role switched to slave. Our proposed scheme reduces the delay, message overhead, control overhead, and increases the network stability and reliability. Performance results reveal that our proposed scheme significantly improves the performance of the network. © 2010 IEEE.