A method for monitoring a surge in a fluid device, the fluid device being disposed in an operating unit, wherein the method for monitoring a surge in a fluid device comprises steps: providing and displaying a surge line of the fluid device, wherein the surge line is at least related to a characteristic between fluid pressure and a flow rate of the fluid device; based on preset time intervals, sequentially providing and displaying operating points (a1, a2, a3, b1, b2, b3, c1, c2, c3, c4), of the fluid device in a current operation condition, in a coordinate system to which the surge line belongs; and monitoring a surge status of the fluid device according to relative position relationships between the displayed operating points and the surge line, wherein the relative position relationships comprise the operating points being in a surge area and being in a non-surge area, and the surge area and the non-surge area are obtained by dividing the coordinate system by the surge line, wherein the surge line and the operating points are displayed on a display unit that is disposed together with the fluid device or disposed remotely from the fluid device, and the display unit comprises a display panel, a computer display, or a display screen of a handheld terminal, characterized in that when a quantity of the provided operating points exceeds a preset value, removing the first provided operating point therein, so that a quantity of the remaining operating points is the preset value, on the display unit, the operating points are displayed with different brightness levels in an inversely proportional relationship with a time sequence in which the operating points are provided, and an operating point to be removed therein is removed in a manner of display brightness eventually becoming zero, and on the display unit, distinguishable display of the operating points is performed according to the relative position relationships between the operating points and the surge line, and the distinguishable display comprises at least one of color, size, shape, and flickering frequency. providing and displaying a surge line of the fluid device, wherein the surge line is at least related to a characteristic between fluid pressure and a flow rate of the fluid device; based on preset time intervals, sequentially providing and displaying operating points (a1, a2, a3, b1, b2, b3, c1, c2, c3, c4), of the fluid device in a current operation condition, in a coordinate system to which the surge line belongs; and monitoring a surge status of the fluid device according to relative position relationships between the displayed operating points and the surge line, wherein the relative position relationships comprise the operating points being in a surge area and being in a non-surge area, and the surge area and the non-surge area are obtained by dividing the coordinate system by the surge line, wherein the surge line and the operating points are displayed on a display unit that is disposed together with the fluid device or disposed remotely from the fluid device, and the display unit comprises a display panel, a computer display, or a display screen of a handheld terminal, characterized in that when a quantity of the provided operating points exceeds a preset value, removing the first provided operating point therein, so that a quantity of the remaining operating points is the preset value, on the display unit, the operating points are displayed with different brightness levels in an inversely proportional relationship with a time sequence in which the operating points are provided, and an operating point to be removed therein is removed in a manner of display brightness eventually becoming zero, and on the display unit, distinguishable display of the operating points is performed according to the relative position relationships between the operating points and the surge line, and the distinguishable display comprises at least one of color, size, shape, and flickering frequency.