Liquid caustic issuing system and issuing method thereof

The invention discloses a liquid caustic issuing system and an issuing method thereof. The system comprises a billing client and an issuing client which are in communication connection with each other, wherein the billing client is connected with an intelligent card reader/writer, the issuing client is connected with one or more intelligent card controller, and each of the intelligent card controller is connected with an issuing device. The issuing device comprises a flow controller, a big storage groove, a flowmeter, an air valve and a loading arm, wherein the big storage groove, the flowmeter, the air valve and the loading arm are sequentially connected through a pipeline, and the flow controller is connected with the intelligent card controller and the control ends of the air valve and the flowmeter. The method comprises the following steps of: (1) opening the intelligent card; (2) brushing the card, and reading issuing information in the opened intelligent card through the intelligent card controller of t