As a cloud laser cutting and engraving system developed by Ruida Technology, RDV8840G supports IOT (Internet of Things) function and helps users with the remote fault diagnosis, remote firmware upgrade, big data analysis of fault and monitoring of all the equipment by screen through RDCloud system. Besides, based on the conventional laser cutting system, the controller supports multiple means of communication such as one to many, many to one and many to many between the host and equipment in LAN . And it can get rid of connection barrier of the common controller and be connected into LAN, which is powerful and extensible.