Disclosed herein is a server collectively managing rejection codes for each type of a medical image and determining accuracy of the codes for the medical image transmitted from a medical imaging apparatus, providing a feedback, and a method of controlling the same. A medical imaging apparatus disclosed herein assigns rejection codes based on feedback received from the server and a method disclosed controls the same. The server includes a communication circuitry configured to communicate with a medical imaging apparatus, and a controller configured to control the communication circuitry to receive a medical image and a rejection code assigned to the medical image from the medical imaging apparatus, perform an image processing on the medical image to determine the rejection code of the medical image, and compare the determined rejection code and the received rejection code to generate information associated with a result of the comparison.