Thinking is as important as learning. It is one of important and effective learning approaches by recording and reflecting student's own learning attitude and learning performance and referring to others' learning portfolio daily. Although many of students know this approach, but seldom of them put this approach into action owing to the problem of preserving content of reflection and learning portfolio. In this paper, a networked learning reflection mechanism based on blog service is presented. Students can make their learning reflection and view others' with ease. An experiment was conducted at an Institute of Technology upon system completion. The experimental results show that there is a positive correlation between students' learning performance and attitude of learning reflection. It reveals that students who have better learning performance tend to make more reflection on their learning. More than 80% of students express this mechanism has positive affection on their learning.