The invention discloses a negative pressure wound treatment system capable of displaying a relational graph between volume and viscosity of exudate, which comprises a collection bottle, a negative pressure wound treatment device, a wound kit, a wound exudate management device, an arithmetic unit and a display interface, wherein the collection bottle is used for collecting the wound exudate; the negative pressure wound treatment device is composed of a negative pressure source and a controller and used for providing negative pressure for the collection bottle; the wound kit is used for fillingand closing the wound, and communicated with the collection bottle through a connecting pipe; the wound exudate management device is used for detecting the volume and viscosity of the wound exudate in the collection bottle; the arithmetic unit is used for generating a relational graph between volume and viscosity according to the detected data of volume and viscosity; and the display interface isused for displaying the relational graph between volume and viscosity. The invention can be used for detecting volume and viscosity of wound exudate and displaying the relational graph between volumeand viscosity of wound exudate on the display interface, thereby providing references for the medical care personnel to research the management on wound exudate, and thus, the medical care personnel can treat the wound in time when the wound deteriorates.