1. A method for vector descriptor representation and multimedia data retrieval, the method comprising: a quantization step of quantizing a plurality of feature values described by a vector descriptor respectively; a bit representation step of representing each of the quantized feature values in the form of bit; a bit rearrangement step of rearranging the feature values represented in the form of bit from the highest bit to the lowest bit and representing the vector descriptor hierarchically; a variable-length coding step of coding in variable length and storing the rearranged feature values and the number of feature values which are input; a variable-length inversely coding step of inversely coding only the feature values corresponding to the number of the feature values of the stored feature values; a bit inverse arrangement step of inversely arranging the inversely coded feature values and restoring to original feature values; an inverse quantization step of inversely quantizing the restored feature values; and a comparison step of comparing the feature values restored by the inverse quantization with the feature values stored in a multimedia database and retrieving multimedia data.