[Objective] Building an electricity‑centered urban energy internet to achieve secure and coordinated multi‑energy operation constitutes an effective approach to tackle the issues of insufficient renewable energy accommodation capacity and low comprehensive energy efficiency in sending‑end urban power grids. To address the practical problems of urban multi‑energy systems， such as large-scale and geographically distributed resources， multi‑agent participation and difficulties in collaborative utilization， this paper proposes an urban‑level multi‑energy security coordinated dispatch and control architecture and its implementation. [Methods] Firstly， this paper analyzes the development trend of urban energy under the new‑type power system. Core tasks， participating agents and resource objects of urban multi‑energy coordination are identified. Practical challenges faced by urban multi‑energy dispatch and control are summarized. By comparing existing typical dispatch architecture modes， an urban‑level multi‑energy security coordinated dispatch and control architecture and corresponding technical indicators are constructed based on the theories of hierarchical decoupling and collaborative governance. Furthermore， the core functions and key technologies of the dispatch system are presented. [Results] The proposed architecture is applied to the practical engineering construction of a city in Northern China. The curtailment of renewable energy on typical days is reduced by 46%， and the multi‑energy utilization efficiency is improved by more than 7%. [Conclusions] While ensuring multi-agent privacy protection and system scalability， the proposed method significantly improves the efficiency and comprehensive benefits of urban multi-energy and multi-agent coordinated dispatch. It provides a feasible technical path for the construction of urban energy internet under high-penetration renewable energy scenarios.