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In recent years, with the popularization of campus card system water control system, our company has collected many new needs and user feedback. Since the card water control system is used in hot water occasions, when there is steam in the water pipe or the water temperature in the pipe is higher than 95℃, it is easy to cause the water meter movement to be deformed by heat, causing the meter to leak, especially in the open water occasions, this phenomenon is more serious. In response to this phenomenon, our company has developed an intelligent water-saving valve with an electric ceramic valve, which can withstand high temperatures of 200℃, and has a long valve life and a switching frequency of >300,000 times, but it belongs to the category of timed self-service water use, that is, charging by time. The intelligent water-saving valve uses the Mifare one card of PHLIPS, which can be easily realized with other access control attendance and canteen meal sales, and has a very high cost performance.