Chinese Professional Baseball League has been established near 20 years. In the past years, professional baseball has been prosperous and slack off in Taiwan. Most experts proposed to improve the decline from the viewpoint of hardware environment and system, and seldom systematic analysis from increasing audiences' satisfaction. Past experience of international professional exercises showed that audiences' satisfaction is influenced by rules. In this paper, we analyze what and how the professional baseball rules influenced audiences' satisfaction in Taiwan by Quality Function Deployment (QFD), Analytic Hierarchy Process (AHP) and Analytic Network Process (ANP). Therefore, the conclusions could be taken into consideration when the rules are reviewed in future and this procedure proposed in this paper could be refereed by other professional exercises.