This paper presents the design of an eLearning Index (eLI) to determine the adaptability of a corporation or education institution for eLearning. Firstly, it describes the framework of eLearning. Secondly, it describes the methodology and the evaluation of eLearning Index. Thirdly, it reports the research results of two surveys. Finally, it concludes its findings on how to assess an organization's adaptability to eLearning. The principal aim of this paper is to design an eLI which is used to determine the adaptability of a corporation or education institution to eLearning before full implementation of an eLearning strategy. In the determination of eLI, staff of a corporation or education institution are required to answer twenty key questions. The average score of the eLI of the staff is used to determine the adaptability to eLearning. The higher the average score of the eLI is, the better the adaptability of the corporation or education institution to eLearning is.