1. An apparatus for recognizing a hand shape by using a finger pattern, the apparatus comprising: a memory configured to store one or more preset finger patterns according to one or more hand shapes; a camera configured to receive an optical signal and output an image; a controller configured to calculate edges for each pixel line within the output image, detect finger feature data according to a preset feature reference value by using the calculated edges, determine a first pixel line where no edge is detected within an area having a preset size based on the detected finger feature data, generate a second pixel line extending in a vertical direction from the determined first pixel line to the finger feature data, detect a candidate finger pattern by using the detected finger feature data and the second pixel line, and detect a preset finger pattern that matches the candidate finger pattern from the stored one or more preset finger patterns; and a display configured to display a hand shape corresponding to the preset finger pattern.