Promoting the construction of a western financial center is an important part of the construction of the Chengdu-Chongqing Economic Circle. So, what is the foundation of financial development in the Chengdu-Chongqing region? How big is the gap with the national strategic goal? This paper employs the analytic hierarchy process (AHP) method to construct a regional financial ecosystem index system and evaluate the financial ecology in Chongqing and Chengdu. Taking the financial ecology in Shanghai as the standard, it analyzes the gap between the western financial center (co-constructed by Chengdu and Chongqing) and Shanghai financial center. Additionally, it utilizes the PVAR model to empirically test the relationship between financial ecosystems and economic development. The research finds that the development level of the financial ecology in Chongqing, Chengdu, and the Chengdu-Chongqing region lags far behind Shanghai, and some average indicators of the financial ecology environment are relatively backward. A financial center can enhance the aggregation function of financial resources, optimize capital allocation, and promote the healthy cycle of the financial ecology. A sound financial ecology is beneficial to economic development, and economic development, in turn, promotes the development of financial ecology entities and improves the financial ecology environment. Constructing a western financial center helps promote the virtuous cycle of the financial ecology in the Chengdu-Chongqing region, creating an important growth pole and a new power source for the high-quality development of the western economy in China. Based on this, a path for Chongqing and Chengdu to jointly build an inland international financial center is proposed from the perspective of financial ecology.