Servo controlling apparatus and method for holographic information recording/ reproducing system

A servo controlling apparatus of a holographic information recording/reproducing system and a method thereof are provided to move between layers steadily and quickly by performing the optical pick-up servo control of diameter/tangential directions in moving between information layers. A servo controlling apparatus of a holographic information recording/reproducing system comprises: a servo signal detecting unit detecting servo signals; and a signal processing unit(264) outputting the servo control signals in moving by using the servo signals detected from the servo signal detection unit before moving.