This paper presents a web-reading gas meter system based on WiFi communication technology. The MSP430F4152 low-power microcontroller is selected as the main controller chip. The gas usage information is collected through a reed sensor, and the gas usage detection and expense charging can be displayed in real-time. The microcontroller controls the MT7681 WiFi module, which connects to the remote server through the WLAN router and uploads the gas consumption data directly to the remote server. Finally, the user gas usage information can be updated on the Web server in real-time.