Abstract: In order to study the relatively intensity of Zeeman effect split spectrum line, the quantum number distribution and the relatively intensity are presented in detail by the analysis of Hg（546.1 nm）spilt spectrum line in the external magnetic field; the image of coherence circle is obtained by CCD, and the intensity of image is analyzed, the relatively intensity of the spilt spectrum line by image disposed is close to the theoretical result. It is concluded that the phenomenon and rule of Zeeman effect can be analyzed by CCD image technology.

Key words: Zeeman effect, magnetic field, CCD image, relatively intensity