A negative pressure wound therapy system with an alarm function for the flow rate of exudate includes a liquid collecting bottle for collecting wound exudate, a negative pressure wound therapy device consisting of a negative pressure source and a controller, and a wound kit for filling and enclosing the wound, which communicates with the liquid collecting bottle via a connecting tube. The system further includes a flow rate alarm processing module and an alarm warning device. If the flow rate of exudate is greater than a predefined value, the flow rate alarm processing module issues an alarm instruction. The alarm warning device sends a warning message according to the alarm instruction.
