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After analyzing previous researchers' researches, most of them focused on “how to improve teachers' evaluation capability on students' search capability.” In terms of the recording of search portfolio, none of them is complete. Taking the above understanding into consideration, this study combined web 2.0 concept and using the learning portfolio records of internet searching hoping to construct an on-line learning system that can “comprehensively record,” “completely share” and “actively present” the learning portfolio. Subjects of this research are fourth grade primary school students. It is proven by the experiment that no matter the teacher or the student, they all can record the complete search process and observe others' portfolio data in full. For teachers, they can explore students' search behavior in a more complete sense. For students, it is proven by experiment result analysis that observation-based learning is helpful for students search results.