Provided is a data storing and reading apparatus for storing and reading data using a nano device with nano-dots dots regularly arranged, comprising a probe movable by a cantilever so as to be placed onto each nano-dot of the nano device, a bias power supply unit for supplying a storing bias voltage and a reading bias voltage between the probe and the nano device, a light beam generator for generating a light beam to detect a position of the probe, a position detector for detecting the light beam reflected from the probe, an amplifier for amplifying an output signal of the position detector, and a detection circuit for reading data stored in the nano-dot using an output signal of the amplifier.