The purpose of this study is to support the learning activity in the Internet learning space. In this paper, we examine the GRID technology as the knowledge management for supporting collaborative learning (CL). RAPSODYEX (RAPSODY-EX) is a distributed learning support environment organized as a learning infrastructure. RAPSODY-EX can effectively carry out to support CL activities in asynchronous/synchronous learning mode. The mixed distributed learning environment is utilized as a new learning ecology, where individual learning, CL and videoconference are performed on the multimedia communication network. In this mixed distributed learning environment, people can arrange, modify and integrate educational information for the purpose of investigating, decision making, planning, problem solving, building knowledge and so on. Various information in the educational context is referred and reused as knowledge which oneself and others can practically utilize. We aim at constructing the growing digital portfolio database for CL-knowledge management in Internet environment. In addition, we explore the GRID technology of activating human-interactivity for knowledge mining/discovering.