With the continuous expansion of welding methods and welding construction scenarios, the difficulty of monitoring the welding process has also increased. For this reason, this paper designs a remote monitoring system for welding quality based on 5G communication. The system can remotely monitor the working status and position information of various welding equipment in multiple locations in real time, and obtain various information such as welding current, welding voltage, wire feeding speed, gas flow and so on. Realize real-time monitoring of the welding process and retrospective analysis after welding. Due to the application of 5G communication technology, the system is superior to traditional network forms in terms of network structure convenience, real-time performance, stability, and security. Adopting the thinking of building a smart factory, a complete software system has been developed to create a new networked, intensive, digital, and intelligent welding manufacturing model, which is conducive to improving welding quality and efficiency and reducing welding costs. The application of the system in multiple welding equipment of large power plant equipment manufacturing enterprises shows that the system has the characteristics of stable operation, comprehensive functions, and good real-time data transmission, and is worthy of popularization and application.