In view of the requirement of ubiquitous power Internet of things construction in China

a kind of MOA online monitoring technology based on radio frequency identification（RFID in short）sensor label and mind evolutionary algorithm（MEC in short）is proposed. In this paper

a kind of passive RFID sensor label design scheme is proposed firstly. Then

the RFID sensor label circuit design is analyzed. After that

the MOA equivalent model is set up

the parameters k and c that reflect the aging of MOA in the model are solved by using the better optimization ability of MEC so to achieve the on-line monitoring of the aging condition of the MOA. The test results show that the RFID sensor label

which is designed in this paper

can work at passive state

the minimum sensitivity is approximately-17 dBm and the maximum working distance of the sensor label

which is corresponding to the reader power at 2 W

is 10.5 m. The online monitoring algorithm of MOA proposed in this paper can simulate the actually measured current and

under the influence of the added harmonic voltage

the maximum error of the solved k and c values is 0.01% and 0.02%

respectively.