Research on Coordinated Development Level of Energy, Economy, Environment and Technology in Chengdu-Chongqing Economic Circle

China's economy has transitioned from a stage of rapid expansion to a phase of high-quality development. After the Chengdu Chongqing Economic Circle was put forward, the coordinated development of the region has garnered significant attention. In order to enrich the theoretical research of coordinated development and offer practical guidance for achieving high-quality development in the west, we carried out this research. Based on panel data of 16 cities in the Chengdu-Chongqing Economic Circle (CCEC), this study employed Entropy Weight-TOPSIS model and Coupling Coordination Degree (CCD) model to quantify the coordinated development level of CCEC from four dimensions of environment, economy, energy and technology. In additon, Arcgis 10.8 was used to visualize the calculated data, we select the coupling coordination level calculated in 2012, 2015, 2018, 2020 to conduct a spatio-temporal analysis. The results indicated that the coupling coordination degree of CCEC has shown an overall upward trend from 2012 to 2020. Furthermore, we find that in 2018, a radiation situation based on the Chengdu-Chongqing Ring Expressway was formed, and then in 2020, Suining and Neijiang located on the central axis of Chengdu-Chongqing interaction, serving as connecting ports for Chengdu, Chongqing, and other cities, they took the lead in reaching a quality coupling coordination level. These facts indicate that in order to integrally improve and stabilize the CCD of Energy-Economy-Environment-Technology (EEET) tetra-element system in the CCEC, it is necessary to strengthen the interaction level of regional cities and formulate differentiated optimization strategies to make up for their own coordination weaknesses.