<p indent="0mm">The selective C–C bond activation of organic molecules with transition metal complexes has been studied in great demand in organic chemistry. Transition metal-carbon bonded intermediates, generated in C–C bond activation, could be further converted to new functionalized organic compounds. This review summarizes the research progress on selective C–C bond activation by group 9 metalloporphyrins in our group and other teams. It focuses on the activeM(por) intermediates, M<sup>I</sup>(por)<sup>−</sup> anion, M<sup>II</sup>(por) radical and M<sup>III</sup>(por)OH (M = Ir, Rh, Co; por = porphyrinato dianion), which achieved the selective stoichiometric C–C bond activation of ketones, esters, amides, nitriles, TEMPO ((2,2,6,6-tetramethylpiperidin-1-yl)oxyl), ethers and cycloalkanes, as well as the catalytic conversion for hydrogenolysis of C–C bond with H<sub>2</sub>O, isopropanol, DMF as hydrogen atom source, and oxidation of C–C bond with H<sub>2</sub>O as oxidant. The improvement and future development are also discussed.