This research analyzes the revised philosophy class in the 5th Edition of Korean Decimal Classification. It depends on the 1st Edition of KDC despite of the fact that contents and words were revised and changed, numbers for classification were moved, and indices were removed from the previous Edition of KDC. The object of the 5th Edition of KDC, metaphysics and eistemology are organized in the same sub-class(綱) through modifying, sex psychology, development psychology, physiognomy fortune judgment, applied psychology are expanded that its data are increasing in psychology, ethics, moral philosophy are modified.