Objectives : Recently, in Sasang Constitution Medicine (SCM), many researchers have studied to construct objective diagnose tool for the SCM type. It is most important to collect correct constitutional clinical data in these studies. Methods : In our work, we construct a web-based system for collecting constitutional clinical data effectively. Results & Conclusion : The system offers 4 types of input programs, which helps to collect clinical information from various hospitals, and performs verification service to minimize input errors. Currently, we have collected about four thousands data using the our system and we will provide several analysis tool in the system for researchers.