According to the current existing problem about smart meter such as clock battery undervoltage, no-reports for power outages and other issues in the power grid, the paper introduces a new kind of smart meter and application solutions system based on supercapacitor to slove the problems. The new smart meter contains supercapacitor-type energy storage module and broadband carrier module, and can provide 3 new kinds of application for issues: multimode communication, power failure report system, under voltage problem of clock battery. The paper also building the equivalent mode of charge and discharge about the supercapacitor, with the help of simulink and parameter identification method to demonstrates the working model for the new supercapacitor-type of smart meter.