The reporting device is mainly used for upgrading and renovating old mechanical gas meters. The reporting device, together with Bluetooth enabled mobile phones or tablets, supporting apps (hereinafter referred to as mobile apps), routers, and backend management systems, forms an automatic meter reading system. When in use, the device is installed on the gas meter, and the user connects to the report device through Bluetooth using a mobile app. After setting the WiFi settings of the report device, the report device uploads the gas meter data to the backend management system through the router at regular intervals.