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For engineering application of the intelligent recognition of the meters in electric system, this paper studied an intelligent reading method based on image processing for automatic pointer instrument. First, for the setup problem of the camera with multiple viewpoints and scales, a binary descriptor ORB (Oriented FAST and Rotated BRIEF) is utilized for getting the perspective transformation matrix between the template and the test images,and then locate the pointer rotation region. Second, according to the gray character information of the dial, a Circle-based Regional cumulative Histogram (CRH) method is proposed to finely locate the pointer, then the reading is obtained by the pointer deflection angle. The experimental results demonstrate that the method is of high efficiency and up to the engineering requirement. Meanwhile, the method is real time and accuracy for the pointer reading recognition.