This study explored the relationship between learner’s cognition of the E-learning media and their imagination ability which included of the abilities in initiation, fluency, flexibility, and originality. Designers absorb design information and combine their imagination to create wonderful jobs. However, designers who with different imagination abilities need different design information. This study set two kind of information either belong to the Declarative knowledge or the Procedural knowledge, while the Declarative knowledge is concretized, and the Procedural knowledge is abstract. Duo-code Theory was applied in encoding the E-learning materials to three encoding types included image encoding, image with text encoding and text encoding.The students'' cognitive processes of digital media learning were performed and statistic analyzed.

The result showed, high initation students has better learning at all the knowledge, high fluency students has better learning at declarative knowledge, high flexibility students has better learning at declarative knowledge and procedural knowledge, high originality students has poor learning at all knowledge. In teaching material: Text encoding has better learning at figurative knowledge, Image encoding has better learning at abstract knowledge, and two knowledge mixes will affect the students learning.