Abstract The Ministry of Education, represented by the Directorate-General of Planning and Quality Management, Directorate-General of Administrative Affairs, has been certified the ISO 9001:2015 certificate. The certificate is considered an international standard for quality management and services and is aimed at improving the administrative system to achieve high quality. ISO 9001 is applicable to any organisation irrespective of their size or geographical location. One of the major strengths of ISO 9001 is its wider appeal for all types of organisation. Because it focuses on processes and customer satisfaction rather than procedures, it is equally applicable to service providers. ISO 9001 QMS provides the infrastructure, procedures, processes and resources needed to help organisations both monitor and improve their performance to drive efficiencies, client service and product excellence. Customer satisfaction is main element because of the performance of General Directorate in their administration. Other than that proper system will be apply due to ISO application in ministry of education in Oman. Management commitment is another main factor for the employees in the Ministry of Education in order to provide quality service. In previous research also determine that effectiveness and efficiency are important factor in ISO implementation in MOE.