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In view of problem that whole performance of WIA-PA will be reduced in long-term running because of energy consumption and node fault, the paper proposed a method of WIA-PA health evaluation based on FAHP. The method builds fuzzy consistent matrix through selecting six indexes that have great influence on network, namely numbers of failure node, signal intensity, node energy, link quality, packet loss rate and network delay, then it calculates evaluating score of each index to obtain average score of whole network, so as to realize judgment of level of WIA-PA health state. The experiment result showed that the method can judge network state effectively.