Mobile Ad Hoc network（MANET） is a multi-hop noncentric self-organizing wireless network

in which there are two important route optimize metrics—load and energy.It is hard to fully describe the two metrics by using numerical value because of their dynamical varieties during routing process.With the idea of fuzzy sets and fuzzy logic

a fuzzy logic and state aware routing protocol（FLSAR） is proposed

and an integrated route metric is presented

which enables load and energy to be balanced in the whole network.The simulations by NS2 illustrate that the throughput and lifetime of the network are effectively improved.