An investigation into the symbiosis of ecological technological advancement, augmentation of the tourism sector’s framework, and the progressive metamorphosis of the economic vitality of tourism suggests potent methodologies for the attainment of elevated, eco-consciously refined development within the tourism domain. This study, grounded upon panel data between 2000 and 2019 from a quartet of provinces and municipalities within the Yangtze River Delta and harnessing the technique of OLS regression, initially dissects the interconnection between ecological technological ingenuity and the fiscal escalation of tourism. Subsequently, this study delves into the intermediary function of the tourism sector’s cadre by utilizing a model to ascertain the mediation impact. The exposition uncovers several findings: (1) Ecological technological innovation not merely engenders affirmative repercussions during its contemporary term but is also poised to endow future tourism with fiscal augmentation; (2) The innovation within the Yangtze River Delta milieu fosters the refinement of the tourism industry’s scaffold, though with a brief time of latency; (3) Within the odyssey of ecological technological innovation and the economic propulsion of tourism, the refinement of the tourism industry’s structure assumes a compartmentalized mediating influence; (4) Differential analysis reveals that, in comparison to their counterparts in Zhejiang and Anhui, the initiatives in ecological technological innovation in Shanghai and Jiangsu provinces show a more emphatic impetus towards the economic proliferation of tourism.