The　development　of　new　energy　and　the　application　of　intelligent　technologies　are　crucial　for　ensuring　energy　security　and　promoting　high-quality　economic　growth.　This　article　utilises　a　sample　of　A-share　listed　enterprises　in　China　from　2008　to　2020,　employing　a　difference-in-differences　(DID)　approach　to　explore　the　impact　of　new　energy　demonstration　cities　(NEDC)　on　innovation　quality　and　focuses　on　the　role　of　intelligent　development.　It　is　found　that　the　construction　of　NEDC　contributes　to　the　improvement　of　enterprise　innovation　quality.　Corporate　intelligence　transformation　further　enhances　the　effect　of　the　NEDC　policy,　demonstrating　a　synergistic　relationship　with　new　energy　transition.　Additionally,　compared　with　collaborative　innovation,　the　improvement　effect　of　NEDC　policy　on　enterprise　self-innovation　quality　is　more　significant.　Non-state-owned　enterprises,　those　in　the　growth　stage,　with　a　solid　technological　foundation　and　located　in　non-resource-based　cities　are　more　likely　to　achieve　improvements　in　innovation　quality　during　the　energy　transition.　Our　work　provides　empirical　evidence　and　valuable　insights　for　ensuring　energy　security　and　facilitating　intelligent　innovation　development.