Provided are a processor device capable of correcting white balance without applying a burden to a user in a case where an endoscope that is not suitable for a light source device or a processor device is connected, and a method of operating the same.A correction coefficient acquisition unit acquires a correction coefficient from endoscopes. The white balance control unit selects and executes either first white balance processing in which an acquired correction coefficient is referred to, and white balance is corrected using the acquired correction coefficient, or second white balance processing in which the white balance is corrected using a first multiplied correction coefficient obtained by multiplying the acquired correction coefficient by a first conversion coefficient.
