The self-declaring payment device has measurer comprising monochip computer, measuring sensor, real-time clock, and display set. The monochip computer measures related data via the measuring sensor based on the real-time clock, enciphers and checks to form declaring data, which is displayed in the display. The user declares directly to the relative department. A control mode based on time, rather than special communication equipment to collect data, is adopted. The device is used first by the user to declare data to related department and pays in the same time. |