This paper studies the experimental application of our new formative evaluation method, Unified Evaluation Method", which combines the pupil's self-evaluation and the teacher's objective evaluation of a pupil's answer to each problem in an achievement test. At first, we give an outline of the unified evaluation method and its data processing system. In spite of easiness of a test practice based on the method, the unified evaluation informations through the test are so new and more detail than ever that they can serve to improve both pupil's self-evaluation and learning process as feedback informations. Next, two examination projects related to our new information of pupil's self-evaluation state are investigated based on practial data: One is the influence due to the differences of both pupil's grade (or age) and sex. Another is the relation between pupil's self-evaluation state and learning activity. By these analyses, we have obtained useful guidance knowledge for the teacher who will make use of the unified evaluation method to know and guide pupils better. Finally, we verify availability of our method (mainly the feedback effect of unified evaluation information) through case studies. Freedback information based on the unified evaluation has proved to be effective for improvement of both pupil's self-evaluation and learning processes.