Mobile Wi-Fi traffic accounting system

The utility model relates to a mobile Wi-Fi traffic accounting system. The mobile Wi-Fi traffic accounting system is characterized in that the mobile Wi-Fi traffic accounting system includes a home mobile gateway which acquires data packets exchanged between each terminal and a broadband access server and is bound with a telecommunications sector, a traffic accounting apparatus used for accounting traffic, a system line detection apparatus which is used for detecting whether network lines are normal or not and transmitting detection results to a monitoring center, the monitoring center and a backup service platform; when receiving detection results of faults of the network lines, the monitoring center will transmit information to the backup service platform, and the backup service platform starts a free mode bound with mobile Wi-Fi, and the traffic accounting apparatus does not perform accounting; and when receiving detection results of getting normal of the network lines, the monitoring center will transmit information to the backup service platform, and the backup service platform turns off the free mode bound with the mobile Wi-Fi, and the traffic accounting apparatus begins accounting. With the mobile Wi-Fi traffic accounting system adopted, interests of consumers can be protected, and complaints of the customers can be reduced.