Measurement of hydrophobicity is not only a main way to evaluate the performance of insulators, but also an important factor to ensure the safety of insulators.A novel hydrophobic measurement algorithm based on information fusion technology is proposed in this paper. By the triangle module operator, the membership function of area ratio and shape factor are fused together to classify the hydrophobicity. The new method could meet the requirements of hydrophobicity detection under field and experimental environment. The test results prove that the novel method overcomes the shortcomings of traditional one and improves the accuracy of measurement of hydrophobicity. As a result, it is suitable for dealing with hydrophobic detection and has wide application prospect.