Two topics are presented about the magnetic properties of iron (II) phthalocyanine (FePc) adsorbed on metal substrates. The spin state and switching of magnetic anisotropy of FePc on Cu(110) and Cu(110)(2×1)-O are discussed based on the spin excitation spectra and the magnetic field evolution in the first topic. In the second topic, the formation of Kondo resonance state is described for FePc on Au(111) and the spectral evolution from an isolated molecule to the cluster and the Kondo lattice is discussed by the competition of the Kondo effect and antiferromagnetic Rudermann-Kittel-Kasuya-Yosida coupling between the molecular spins.