The development of information technology that has occurred to date has made information technology necessary in an organization's business in various fields. Information technology support is very much needed in the current era of globalization because it can increase business effectiveness and efficiency. Utilization of technology optimally and in line with business processes is the main thing in developing the application of information technology. Senior High School (SHS) is one of the educational agencies in Indonesia that is developing following the development of technology. SHS institutions realize how important it is to apply technology in supporting their business processes. At present, the SHS institution has been helped with technology such as the use of Excel in all recording in schools, but the SHS institution itself has not implemented optimal and integrated information technology in every field of school activity which often occur in data loss, delivery of information both in terms of learning as well as school activities that require a long time, and not integrated the school system. The application of information technology that will be used by a school must be by the goals of the school so that the application can help the school well in achieving school business goals, the use of Enterprise Architecture (EA) in the application of information technology to help analyze information technology planning by SHS institutions. This study will use The Open Group Architecture Framework (TOGAF) to assist in application planning. The final results of this study proposed six application blueprints namely Academic System, Non-Academic System, Procurement Management, Financial Management, HR Management, and Data Management which are tailored to the business process and the needs of the SHS institution.