It is basis of building phylogeny of Chinese Characters to study phase and dating of Chinese Characters Font. Therefore, the precondition of ontological researching of Chinese Characters on a certain stage is phase and dating the styles. However, it is difficult to do this kind of researching. The Stone Inscription of Wei, Jin, south and North Dynasties is in the transition stage of the Chinese characters from the clerical script to the regular script. It is more difficult to determine the Font of the stone inscription. This paper try to do some practical researches through selecting some typical stone inscription from The Database of Stone Inscription of Wei-Jin and South and North Dynasties《魏晉南北朝石刻數據庫》and making comparison between them. The database was made by Center for The Study and Application of Chinese Characters in ECNU.