Imagination is indispensible mental function to human. Human can understand new environment, make future in their mind and have an eye for new something through imagination. Art education is able to increase imagination. This study'S results is the ability of an imagination scale proposing the imaginary picture ability which express imagination in art educational activities as one kind of ability. I choose sub factor under the artificial notion on imaginary picture ability and make related inquiries. Finally, I selected the 38 inquiries through pre-examination, primary-examination's verification of reliability & validity; 12 inquiries- imagination ability on sensible imagination, 6 inquiries-imagination ability on feeling . sentiment, 9 inquiries-imagination ability on situation· activity, 6 inquiries-imagination ability on fanciful imagination, 5 inquiries-imagination ability on product imagination. I can reach the conclusions as following by these study methods ; First the imagination ability is a kind of ability to picture and express freely through reorganizing imagination of image about sense, feeling, sensibility, situation, activity, product, etc. Second, the sub factor of imagination ability are 'imagination ability on sensible imagination', 'imagination ability on feeling . sentiment', 'imagination ability on situation . activity', 'imagination ability on fanciful imagination', 'imagination ability on product imagination'. Third, the ability of an imagination scale development is very necessary and gets high position because art education have significant suggestion which unifying sensibility and intelligence, understanding situation and environment, raising new eyes and creativeness in relationship with imagination.