A delivery robot control apparatus for controlling a delivery robot to unload an object and a method thereof are disclosed. A camera is provided in the delivery robot having an internal loading space for one or more floors and obtains an image including a door module which is provided in the delivery robot and connected to a frame forming the internal loading space. The controller determines up and low positions of the door module based on the image, and controls a first motor to move the door module to a target position based on the determined up or low position of the door module.