The present invention relates to a wound volume measuring method and device, wherein the method comprises the steps of: disposing a foam dressing on a wound site； hermetically sealing the wound site by attaching a film dressing on skin adjacent to the wound site； supplying a negative pressure to the hermetically sealed space formed between the film dressing and the wound site, and thereby discharging fluid into the hermetically sealed space； measuring the flow of the fluid discharged from the hermetically sealed space； and calculating the volume of the wound site on the basis of the measured fluid flow.
