The 5G 700M & XG converged communication system addresses key challenges including high 5G construction costs, insufficient capacity in extreme scenarios, unmet industrial control requirements, and weak signal coverage in complex industrial energy environments. Its core network adopts an integrated architecture of 4G+5G+AC+IoT + cloud-network convergence, enabling compatibility with both new and legacy networks, unlocking computing power, and maximizing existing equipment utilization. It lays a solid foundation for underground MEC deployment and resolves the limitations of insufficient application scenarios and weak management control for 5G services. The wireless network cost can be reduced by 30–40%. The 700 MHz frequency band complements high-frequency signals to make up coverage deficiencies. The intrinsically safe converged base station cuts installation and maintenance workload by 90%, delivering outstanding promotion and application value.