Parking lot cloud platform ETC fee deduction system and method

The invention discloses a parking lot cloud platform ETC deduction system and method, and the system enables a cloud platform to be disposed on a cloud server, and is connected with a parking lot system, an antenna, and a PSAM cloud service. The parking lot system obtains a license plate number and a license plate color of a vehicle driving into an exit of the parking lot and transmits related information of the vehicle to the cloud platform, the cloud platform judges whether a deduction amount exceeds a set quota, if so, the cloud platform returns quota exceeding information to the parking lot system and changes a payment mode, otherwise, the antenna is notified to initiate an ETC deduction application and the antenna reads ETC equipment information, and the payment mode is changed. Whether ETC fee deduction conditions are met is judged, if yes, the cloud platform is notified to initiate a consumption MAC1 calculation request, and the consumption MAC1 calculation request is sent to an antenna for fee deducti