In case of sensory evaluation with multi-samples and long-period, in spite of using method with good sensitivity, quality differences among samples could not be detected well because of panel`s fatigue and tiredness. So new method to reduce panel`s sense of psychological and physiological responsibility, $quot;Trio Paired Comparison$quot;, is designed, and New Modified Scheffe`s Method 2 as the statistical method for a test of $quot;Trio Paired Comparison$quot; is proposed. And also in this paper problems and countermeasures in applicating $quot;Trio Paired Comparison$quot; are considered.