University libraries need to reborn as central space of the academic activities of university at the 21st century knowledge-based society. This study conducted case study on P University libraries and explored the directivity of spatial composition to actively respond to needs of customers. To do this study, we examined the related papers in and out of Korea, visited major academic libraries in Korea and compared the cases. And we did a survey targeting the customers of P university libraries. The result of survey confirmed that the needs of customers almost correspond to the directivity of spatial composition which we found at the cases for this study. The result of this study can be some references for Korean university libraries to improve their space and do user-oriented library marketing.