This article addresses the question of how to build human relations in web-based collaborative learning. Although the field of web-based education/training (WBE/T) has grown rapidly in the last few years, there has been little systematic research on the issue of group formation in such environments. It is the difficult to build human relations in such situations, due to the associated problems in computer-mediated communication. In physical environments, a person often guesses other's personality through nonverbal communication, which is very limited in Computer-Mediated Communication (CMC). The aims of this article are three-fold. First, the concept of personality information for awareness (PIA) is proposed, followed by the design of a a PIA-based system called "PIAGETS", which supports human relations building for collaborative learning in WBE. Next, the details of self-analysis subsystems and user aide subsystems, consisting of YG personality test module and Group Formation module respectively are given. Finally, the details of a basic investigation of human relation in face-to-face class are provided. The aim of this experiment is to clarify the human relation building with focus on group formation process in face-to-face classes which hopefully could be applied or extended to online class, i.e. web-based collaborative learning.