A periodical performance appraisal is not only a business routine, but also a critical assignment that deserves a service-oriented organization to address increasing attention.This article explores the progressive services of Taipei Public Library by examining the mechanism of performance evaluation and visiting the top-performing branch libraries in recent three years, which provides you with an opportunity to learn the essence and implication from the unique performance evaluation system. On celebrating the 60th anniversary of Taipei Public Library, we feel it honored to present the paradigm of library service excellence for other public libraries to ponder, learn, or follow.