Method and device for encoding/ decoding image supporting plurality of layers

A method of decoding an image supporting a plurality of layers, the method comprising:

• receiving a bitstream including information on a decoding target block of the current layer;
• entropy-decoding the bitstream and obtaining a 1D array of transformation coefficients of the decoding target block;
• scanning the 1D array of the transformation coefficients according to a scan order and rearranging the 1D array of the transformation coefficients as a 2D array of the transformation coefficients;
• inversely quantizing the 2D array of the transformation coefficients and obtaining a 2D array of transformation coefficients inversely quantized for the decoding target block;
• and
• predicting the decoding target block based on a prediction mode for the decoding target block,
• wherein in the rearranging of the 1D array as the 2D array of the transformation coefficients, the scan order is derived based on the prediction mode applied to the decoding target block.