In Taiwan, courses in the current online learning environment enroll at least 40-100 students, and it is difficult for teachers to manage the learning situation of each student. The proposed system treats learning portfolio, knowledge structure, and ability indicator of students as the key points of learning situations. The system integrates the information into the same framework and interface to acquire overall information of students. The learning activities in the proposed system include three stages: self-learning stage, mutual learning stage and guidance stage. This study adopted Multi-Phase Guided Remedial Learning Strategy in a learning evaluation. The learning evaluation yields positive experimental results. The evaluation shows that the proposed learning activities are effective for students learning.