Abstract: A defect in the harmonic statistical function of the terminal will affect the information acquisition accuracy. As to the issues, an harmonic statistical test method is proposed on the basis of boundary value analysis for power information collection terminal, through which the potential fault of the acquisition terminal on harmonic statistics function is analyzed. The value equal, just above or just below the boundary of input field, output field and state transition are selected as test data and the hidden defects at the boundary are judged. The test results show that the method is feasible and valid.