Using a Langmuir-Blodgett film of 9-(hexadecylimino)-3,5-diazafluorene (L) as a template, we succeed in making an ultrathin film of CuSO4 . 5H(2)O, which just is oriented in a (010) crystal face. Compared with the normal method, this route can get a certain crystal face directly and save both labor and time. The relationship between the ultrathin crystal film of CuSO4 . 5H(2)O and the Langmuir-Blodgett films is also discussed, and it indicates that the quality of the CuSO4 . 5H(2)O film depends on the structure and defects of the L Langmuir-Blodgett film.