This study aimed to explore the construct of imagination. In Experiment 1, we collected the imagination-related phrases from the reldrted references, as well as 198 undergraduates’ definitions of imaginataion. We classified the imagination-related phrases into 14 categories to establish “Imagination Concept Evaluation Task (ICET)”. In addition, Eight experts of imagination were asked to use paired comparison to evaluate the distinctions among the imagination-related phrases. The results of Multidimentional Scaling analysis show that imagination contains three components: imagination production, beyond reality, and imagination response. In Experiment 2, the participants were either required to apply the “beyond reality” skill to create ideas. In Experiment, the participants were or required to perform imagination thinking. The results of Experiment 2 and 3 support that in the Model of Imagination Definition involves the constructs of both beyond reality and imagination. The construct of imagination which we obtained from this study can be as used a guidance for the future studies and the practices regarding imagination.