Surgical robot and control method for the same

A surgical robot comprising a slave device that includes a robot arm, to which a surgical instrument provided with a surgical tool is coupled, and a master device that controls operation of the slave device,

• wherein the slave device includes:
• an external force measurement unit that includes a force sensor attached to the surgical instrument to measure external force applied to the surgical tool, and a visual information display unit connected to the force sensor to receive the measured external force from the force sensor and display visual information corresponding to the received external force;
• an image capture unit that acquires an image corresponding to the visual information displayed on the visual information display unit;
• and
• a controller that extracts the visual information from the acquired image from the image capture unit using image processing, and converts the extracted visual information into corresponding external force information.