the present invention is related to a image compression and transmission method , and particularly to a method of relocating a wavelet packet coefficient for a zerotree coding in order to optimize an encoder to be suitable for transmitting image off - line . to realizing the present invention , for the wavelet packet coefficients , located on frequency bands which are divided in several subbands according to frequency of an image data thereon , the present invention collects coefficients in same location on each of the subbands , and relocates the collected coefficients in a same location in an integrated frequency band , formed by integrating the subbands .