A systemfor displaying a force acting on a surgical tool configured to be closed to grip and opened to dissect an object so that the force is perceptible to an operator, the system comprising: a display device (60, 260A, 260B); a control device (50, 150, 250, 350, 450, 550, 650, 750); and a surgical tool sensor (17, 17A, 17B) configured to measure opening and closing forces applied to an outside by the surgical tool; the control device (50, 150, 250, 350, 450, 550, 650, 750) comprising: an input portion configured to receive input from the surgical tool sensor (17, 17A, 17B), of a measurement signal of a gripping force, which is a force to grip the object, or a dissecting force, which is a force to dissect the object, in the surgical tool depending on a direction in which the surgical tool is actuated; an image generator (53, 153, 253, 353, 453, 553, 653, 753) configured to generate image information for displaying information on the gripping force as a grip display mode and information on the dissecting force as a dissection display mode different from the grip display mode based on the measurement signals; and an output portion configured to output the generated image information to the display device (60, 260A, 260B), the display device (60, 260A, 260B) being configured to display the image information. a display device (60, 260A, 260B); a control device (50, 150, 250, 350, 450, 550, 650, 750); and a surgical tool sensor (17, 17A, 17B) configured to measure opening and closing forces applied to an outside by the surgical tool; the control device (50, 150, 250, 350, 450, 550, 650, 750) comprising: an input portion configured to receive input from the surgical tool sensor (17, 17A, 17B), of a measurement signal of a gripping force, which is a force to grip the object, or a dissecting force, which is a force to dissect the object, in the surgical tool depending on a direction in which the surgical tool is actuated; an image generator (53, 153, 253, 353, 453, 553, 653, 753) configured to generate image information for displaying information on the gripping force as a grip display mode and information on the dissecting force as a dissection display mode different from the grip display mode based on the measurement signals; and an output portion configured to output the generated image information to the display device (60, 260A, 260B), the display device (60, 260A, 260B) being configured to display the image information. an input portion configured to receive input from the surgical tool sensor (17, 17A, 17B), of a measurement signal of a gripping force, which is a force to grip the object, or a dissecting force, which is a force to dissect the object, in the surgical tool depending on a direction in which the surgical tool is actuated; an image generator (53, 153, 253, 353, 453, 553, 653, 753) configured to generate image information for displaying information on the gripping force as a grip display mode and information on the dissecting force as a dissection display mode different from the grip display mode based on the measurement signals; and an output portion configured to output the generated image information to the display device (60, 260A, 260B), the display device (60, 260A, 260B) being configured to display the image information.