The evaluation for the matching level between the optical resolution and the pixels number on the full field of view of the capsule endoscope, and the evaluation methods for the resolution effectiveness of pixels number were established. This method selects the horizontal optical axis section as the meridian plane to analyze. The section passing through the planar array sensor is row or column scanned. The line resolution elements number, the line pixel efficiency, the center field matching rate, and the full field maximum matching rate were derived by the analysis unit using the optical resolution angle and the pixel element projection angle. The simple conversion method of resolution length and resolution angle on the spherical field of view can simplify the measurement. These parameters not only constitute the evaluation basis for matching ratio and resolution validity of the pixel number of the capsule endoscope, but also offer a reference for product design, analysis and modification.