User Interface is communication channel that end-user can interact with a system. All knowledge against a system occurs in compliance with the interaction of the user and interface. Therefore, according to development environment of the application changes rapidly, we became to need interface design to support complex interaction between human and computer. In this paper, we suggest user-centered design models to standardize user interface prototype and supports flexible development in any GUI environment. For these, we divided by 4 details model (event object, task object, transaction object, form object) and presented user interface implementation model. This method can be reduced system development number of times as well as encourages visual cohesion of interface prototype, understanding of business task.