Good web interface design is an important factor that helps users "interact" with computers. Nowadays, web interfaces must be presented and designed in such a way that they can be easily understood by the user. In the field of design, the elements that users see on a computer screen such as text, graphics, icons, etc. they constitute the interface of a web page (Dabbs, 2002). Users rely on the interface to complete online tasks and interact with computers, and maintaining consistency is undoubtedly an important principle to follow when designing a good interface. Designers, manuals, and guidelines from the late 20th century to the present emphasize the importance of consistency, particularly the physical consistency, look and feel, and visual characteristics of an interface. With many previous studies and experiments, it has been questioned whether physical consistency in user interface design, in this case, web interface design is an important factor in human-computer interaction (Axelsson, 2012). The purpose of this paper is to explore whether physical consistency of web interface design matters in terms of performance and user satisfaction. In 1998, computer scientist Ben Schneidermann wrote a seminar book that outlined the “Eight Golden Rules of Interface Design,” and “Look for Consistency” was the first rule on the list (Geest, 2005). Interface consistency has always been a widely debated principle and a difficult term to define. There are many definitions for the term, but none are widely accepted. Although interface coherence itself has no clear definition, according to researchers and practitioners, coherence is generally the design principle that reinforces the importance of uniformity (Stone, Vase... in the center of the card..., D. , Jarrett, C., Woodroffe, M., & Minocha, S. (2005) User Interaction Design and Evaluation Amsterdam, Netherlands: Elsevier.AlTaboli, A. & Abou-zeid, M.R. (2007) of Web Interface Design on Performance and User Satisfaction. HCI Applications and Services, 4553, 849-858 doi:10.1007/978-3-540-73111-5_94Ozok, A. A. & Salvendy, G. (2000). of Web Page Design Consistency and Its Effects on Performance and Satisfaction, 43(4), 443–460.Grudin, J. (1989) The Case Against User Interface Communications of the ACM, 1164-1173.Hurst, M . (2006). Chicago, IL: 37signals.Spool, J. (2005) Retrieved May 6, 2014, from http://www .uie.com/brainsparks/2005/09/15/consistency-in-design-is- the-wrong-approach/