Based on analyzing the MOA various electrical properties of the basic parameters of the physical，discussing the factors which affect the accuracy of MOA test data，this article has explained how to estimate the MOA electrical properties based on the data from all kinds of testing. In addition, this paper has been discussed and summarized the way of judgment MOA performance is energized testing combined with the de-energized testing, and comprehensive analysis all the test data is accurate and reliable method to judge MOA condition.