A camera monitoring system includes: a housing rotatable around a coupling shaft of a base part disposed in a vehicle; a camera disposed on one end of the housing; a cam plate disposed inside the housing and fixed to the base part; a link including a first end moving along a guide part of the cam plate and a second end to rotate the camera when the housing rotates; a driving part for applying a driving force to rotate the housing; and a control part to determine a folded state of the housing by controlling the driving force applied from the driving part based on a vehicle speed, and to rotate the camera simultaneously with the housing based on the folded state of the housing so as to maintain a previously set angle of a camera view.