The employment of students' ratings to evaluate faculty's teaching quality in university is a growing trend in Taiwan, yet its application has encountered many difficulties. One of the better ways to tackle those problems seems to be developing an evaluative scale with good reliability and validity. Hence, the present study aims to develop an evaluative scale by utilizing 9W and 5S thinking model, namely, evaluating faculty's teaching quality through students' ratings. Literature review in the present study includes the results of similar practices held by different universities as well as other related researches. The empirical study, a two-stage research design, results in a 19-item scale by the name of ”University Teacher Instructional Evaluation Scale” (UTIES). UTIES can be categorized into six subscales: ”teaching preparation,” ”teaching attitudes,” ”teaching capabilities,” ”classroom management,” ”homework and assessment,” and ”student self-ratings.” The results of statistic tests showed that UTIES has good reliability and validity. Moreover, UTIES does not show salient measuring bias toward faculty's gender, professional rankings, collegial or departmental affiliation, or any employment status.