The utility model discloses a device for storing, displaying and analyzing measured values of the peak expiratory flow rate. The device includes a circuit system used for storing, displaying and analyzing the measured values of the peak expiratory flow rate, wherein the circuit system includes a resistor assembly formed by a plurality of resistors connected in series, a primary wire distributed in parallel with the resistor assembly, as well as a power supply connected between the resistor assembly and the primary lead, a current based peak flow rate display used for storing, displaying and analyzing current values, and a mobile switch being in bridge connection between the resistor assembly and the primary wire, wherein the mobile switch is matched with the power supply, the primary wire, the peak flow rate display and the resistor assembly, so as to form a loop. The circuit system drives the mobile switch to move through expiratory air flow, so as to increase or decrease the current value of the resistor assembly, and the peak flow rate display stores, displays and analyzes different current values, as a result, the measured values of the peak expiratory flow rate can be stored, displayed and analyzed. The device can continuously store the monitoring results for each time, and provides complete data, thereby facilitating objective evaluation on state of an illness.