The construction of creative writing subject systems and the training of creative writing talents urgently require the quantitative theory of creative writing ability and assessment practices. Existing achievements, such as those in modern psychology, pedagogy, and management evaluation, not only make the quantitative theory of creative writing ability possible but also provide methodologies for reference. Through case analysis, this paper identifies 55 creative writing ability factors, classifying them into basic skills and professional abilities, and proposes solutions for further quantitative analysis research.