The invention discloses an integrated head device of an SERF atom magnetometer. For the optical excitation detection and high-temperature heating requirements required by a gas chamber of a head of the SERF atom magnetometer, integrated design is carried out on key components, such as an excitation component, a detection component, a heating component and a heat insulation component; excitation light and detection light enter in parallel through an adjustable mirror structure to greatly reduce the volume of the head; and components around an alkali metal gas chamber are fixed by using a tightfit structure, so that the volume of the head of the SERF atom magnetometer is reduced, the debugging efficiency of an excitation device and a detection device is improved, and meanwhile, heat conduction of a heating device and an external environment is reduced. The head device with high reliability and high stability is provided for miniaturization of an SERF atom magnetometer array and measurement study of SERF magnetic fields.