The invention relates to a crane cab seat system which comprises an arm support, a lumbar support, a head support, a seat body, a seat base, a control system and a seat adjusting mechanism. The system changes a mode that a traditional seat for a crane driver cannot be adjusted or is adjusted passively, so that the driver can observe the site conveniently, and the disadvantage of the difficulty in angle control is overcome; an existing device is only required to be modified a little and implementation can be carried out; and the crane cab seat system is convenient to install and use and high in adaptability.