Robot system and coupling method

A robot system that performs work of coupling a flexible cable to a connector provided on a board, comprising:

• a robot in which a gripping unit that grips the cable and a force detection unit that detects a force acting on the gripping unit are provided;
• and
• a robot control apparatus that controls the robot, wherein
• the robot control apparatus controls the robot to perform
• a conveyance action for the gripping unit to grip the cable with a first gripping force and convey the cable onto the board,
• a correction action for the gripping unit to grip the cable with a second gripping force smaller than the first gripping force and correct a posture of the cable based on the force acting by pressing the cable against the connector, and
• an insertion action for the gripping unit to grip the cable with a third gripping force larger than the second gripping force and insert the cable into the connector.