This study was to construct the professional baseball fans' consumer decision-making styles scale in terms of the theories of consumer decision-making styles. Confirmatory factor analysis (CFA) was used to examine the research model to establish the reliability and validity of the scale. 537 valid questionnaires were collected. The fit indices showed the model hold and it had convergent validity, discriminant validity, and good reliability. The results indicated that the scale was “an oblique multi-factor model”. It included eight factors: perfectionism or high-quality consciousness, brand consciousness, novelty-fashion consciousness, recreational, hedonistic shopping consciousness, price and “value for money” shopping consciousness, impulsiveness, confusion from over-choice, and habitual, brand-loyal orientation toward consumption.