Educational technology is recognized for providing learners with opportunities to receive high-quality education. If used properly, these technologies will enable learners to study at any time and anywhere in a virtual environment, unrestricted by time and space, creating meaningful learning experiences for them. If applied properly, educational technology will enable a learner-centered approach to learning. Therefore, over the past two decades, the development and application of educational technology have drawn the attention of governments, academic organizations, educational scholars, frontline teachers, and parents worldwide, making it a popular research topic. With the continuous development of educational technology, the expansion of educational technology theories, and the outbreak of COVID-19 in early 2020, the adoption of educational technology to promote school closures in response to pandemic prevention policies has highlighted the importance of issues related to educational technology. Therefore, a Special Issue on the theme of "Effectiveness and Sustainable Application on Educational Technology" was organized.