Instrumental reason and technologism cover up the purposive or ethical pursuit of educational evaluation,result-ing in its purpose of ignoring the qualitative growth of life and the significance of self-actualization.Educational evaluation tends to have a strong numerical representation in methods,tools,ideas and value,etc.,and is restricted to the increment of individual competitiveness and lacks concern for the spirit world.According to Aristotle,"Praxis"are activities to achieve happiness with actions themselves,which has a high appropriateness with the ontological pursuit of educational evaluation.From the perspective of practical philosophy,educational evaluation is not only an action to meet the needs of a subject but also to judge the good and bad of changes made by a certain educational behavior on a subject,which is in an evolutive,creative and open way based on practical reason.It has three practical necessities:taking actions themselves as the purpose,taking people as the center,and run-ning through the whole process of education.The practical quality of educational evaluation must bring vivid,lively,ultimate con-cern and life-inspired educational practice.This paper carefully examines the purposive or ethical pursuit of educational evalua-tion based on Aristotle's practical philosophy and restores the practical quality of educational evaluation to its ontological value.