Focusing on the offshore islands of Taiwan (Penghu, Kinmen, and Lianjiang), this study explores the status quo and disadvantages on the implementation of educational development for Elementary/Secondary Education in Offshore Islands (ESEOI) by adopting the document analysis and the focused group interview. The result reveals four major disadvantages: (1) the geographic environment, (2) the demographic composition, (3) the inappropriate planning and application of educational resources, and (4) the poor quality and quantity of teachers' manpower. For example, the impact of the geographic environment to the elementary and secondary school students is not only the inconvenient commuting but also result in the crisis of reduction and merging to schools. Based on these findings, some further specific policy suggestions are raised for the related departments, such as, the sectors of educational administration should consider promoting the ESEOI educational niche with positive thinking, providing the policy direction from the innovative perspectives, and developing an integrated framework of collaborative governance to plan and apply the educational resources. These suggestions can also be the references for the practical reform of educational policy.