The issue of ecosystems is attracting renewed interest from researchers. Recent studies have defined ecosystems in terms of their field of intervention and common objectives. This research aims to highlight that, in the context of sustainable urban transition, the involvement of territorial systems in the entrepreneurial process is not limited solely to their areas of intervention. The methodology used is based on the theory of innovative environments and the territorial approach. Interviews with stakeholders and activity reports were used to compile a list of the entrepreneurship systems. This work showed that cities or territories could support sustainable urban transition through entrepreneurship by providing resources for creating businesses that could, in turn, produce sustainable solutions to territorial challenges. The authors would emphasise the territorial entrepreneurial ecosystem of innovation, knowledge, and enterprise systems, as well as other systems that, through their interactions, create added value for the territory. Because each activity or project has its footprint, each system needs to be coordinated to provide a more sustainable solutions.