In Sasang Constitution Medicine (SCM), it is most important that a personal SCM type is determined accurately ahead of applying any Sasang treatments. Although SCM doctors have districted personal SCM types in many hospitals and universities via their own discriminant, it still lacks objective criteria on diagnosis of SCM type. Therefore, many researchers have been studied to diagnose the SCM type using constitutional clinical data. Previous work, we have developed decision tree program to analyze the clinical information. In this paper, we developed a clinical index program based on the web to analyze the correlation among clinical information. Finally, we identified useful factors(4 clinical indexes) which have significant influence on SCM types using clinical index program with previously developed decision tree program.