Phenol and its derivatives widely exist in drug molecules, pesticide molecules, dyes, flavor components (Fig. ). Moreover, phenols serve as important precursors for the synthesis of a range of value-added targets. Thus, the synthesis of phenols from diverse precursors has attracted great attention form the community. Industrial production of simple phenol is through Hock (cumene oxidation) process, accounting for annual production of more than 10 6 tons. On the other hand, synthesis of phenols in laboratory heavily rely on nucleophilic substitution of arenes and transition metalcatalyzed coupling with water. Despite the massive progress, these methods typically require the use of strong bases and high temperatures. Moreover, phenols can also be prepared by oxidation the C-H bond of arenes or arylboron compounds. However, these methods require the use of preformed aromatic compounds as precursors. Thus, developing the synthesis of phenol from non-aromatic compound precursors is attractive. In 2011, Stahl reported the seminal work on the synthesis of phenols from cyclohexanones via a palladium-catalyzed oxidative aromatization strategy under 1 atm O2 in DMSO at 80 °C. Cyclohexanones undergo α-C-H activation to form Pd(Ⅱ) species, followed by C-H activation and β-H elimination to form cyclohexenones. Subsequently, cyclohexenone undergoes an iterative process to give the phenol product. Recently, Leonori reported the preparation of aniline from cyclohexanone under the dual catalytic conditions of photocatalyst and cobalt catalyst. Mechanistic studies reveal that in situ generated enamine undergoes two SET oxidations, deprotonation, and release of hydrogen. This method has achieved great success in the preparation of various substituted aniline compounds. However, the photocatalytic preparation of phenol from the simple cyclohexanones remains underdeveloped, partially due to the high oxidation of silyl enol ethers and their unproductive competing nucleophicility. Herein, we reported a photocatalytic acceptorless synthesis of phenols from cyclohexanones at room temperature. The mild conditions allow for the direct dehydrogenative aromatization of cyclohexanones or cyclohexenones under the dual catalysis of light and cobalt, affording a wide range of phenols with diverse substitution patterns.