Aimed at the high consumption of the resource discovery of mobile cloud computing, an adaptive and efficient approach which realizes auto switch the mode is proposed. Firstly, the consumption-resource quality model for two popular resource discovery modes is set up. Secondly, a heuristic algorithm to implement the proposal is designed to adaptively switch the mobile mode to low consumption mode. Finally, mobile devices work under the lower consumption mode all the time. Extensive simulations prove that the proposal has better consumption performance than the approach which works under single mode.