We have studied the temperature-dependent electronic states of a copper-phthalocyanine (CuPc) monolayer film adsorbed on a graphite substrate by using metastable-atom electron spectroscopy and ultraviolet photoelectron spectroscopy. The CuPc molecules, which are flat-lying at room temperature, become tilted and condensed at temperatures below 130 K. Taking the temperature-dependent transition reported in the literature into account, we conclude that the transition observed in the present study originates from the change in the correlation between the molecule-substrate and the intermolecular interactions. (C) 2007 Elsevier B.V. All rights reserved.