This paper first sorts out the development status of the event industry of the “9+2” city cluster in the Guangdong-Hong Kong-Macao Greater Bay Area，and analyzes the competition pattern of the event industry in the Greater Bay Area from eight indicators including number of exhibitions，total exhibition area，average exhibition area，number of exhibitions above designated size，exhibition theme，number and area of exhibition halls，and the number of members and exhibitions certified by the Global Association of Exhibition Industry. This paper then analyzes the development status of green events tourism，as well as the market background and future development trend of green events tourism in the Greater Bay Area. It reviews the development history of green events tourism in the Greater Bay Area in detail through the case of Canton Fair. The study finds that the “9+2” city cluster in the Guangdong-Hong Kong-Macao Greater Bay Area currently presents a pyramid-shaped development structure in which Hong Kong and Guangzhou stand in the first echelon，Shenzhen，Dongguan，and Macao stand in the second echelon，Zhuhai，Zhongshan，and Foshan stand in the third echelon，and Huizhou，Jiangmen，and Zhaoqing are the fourth echelon. Green events in the Greater Bay Area have entered a growth period. A series of exhibitions represented by the Canton Fair are stepping up the implementation of green event practices，saving exhibition resources and improving the participation experience. In the future，with the improvement of the infrastructure of Guangdong，Hong Kong and Macao，the upgrade of transportation and logistics and the deepening of cooperation，the events tourism industry in the Greater Bay Area will show the development trend of internationalization，specialization and digital high-tech，and comprehensively improve efficiency and benefits. Events tourism will enter a new period of development.