There are many successful International Expositions held worldwide in the past decades. The experiences of those successful cases could be the referent for many countries when holding various expositions in the future. The study chooses three cases from various expositions held by local governments in Taiwan, including Green Expo' of I-Lan, Flower Expo' of Chang-Hwa and Flower Fair of Taipei. By using case study method, this research tries to analyze the planning programming and operational model of Taiwan horticultural expositions through data collection, field participation and interview. Maybe, it is not easy for Taiwan to hold an internationally recognized exposition recently due to the complexity of international political economy. However, the conclusion is we should learn both the art of innovation and creative teamwork to integrate the whole resources, establish a local model of operational system for planning the Horticultural Expos' toward the sustainable future in Taiwan.