Energy conservation is an important issue for wireless Mesh network. The Quorum energy conserving mechanism, discussed in this article , is quite suitable to wireless Mesh networks because it is insensitive to network scale , host density, mobility and multi- hop . Originally designed for the Mobile Ad hoc Network (MANET) environment, the Quorum mechanism can work in two modes : synchronous and asynchronous , according to the difficulty of clock synchronization . Currently, the research on Quorum energy conserving systems focuses on energy efficiency optimization and adaptive system. As for other issues , such as the collaboration between synchronous and asynchronous working modes , and the cross - layer design for integrating Quorum mechanism- bas ed energy conservation with power control and MAC routing , there is much research to do .