A double-reversible screwdriver and wrench combination hand tool constructed to include: a handle, a main body fastened to one end of the handle, the main body comprising a rear coupling end fastened to the handle, a front end terminating in a T-tube formed of a longitudinal tube and a transverse tube, and a receiving chamber on the middle between the rear coupling end and the front end, a longitudinal spindle mounted in the longitudinal tube, the longitudinal spindle having a rear end terminating in a fixed ratchet wheel suspended inside the main body, and a front end terminating in a coupling portion and disposed outside the longitudinal tube, a coupling socket coupled to the coupling portion of the longitudinal spindle to hold a screwdriver bit, enabling the screwdriver bit to be rotated with the longitudinal spindle, a first bevel gear suspended in the receiving chamber inside the main body and rotated with the longitudinal spindle, a transverse spindle mounted in the transverse tube and rotated with the longitudinal spindle, the transverse spindle having a front coupling rod extended out of the transverse tube for holding a wrench socket for turning screw bolts and nuts, a second bevel gear fixedly provided at a rear end of the transverse spindle and meshed with the first bevel gear for synchronous rotary motion with the longitudinal spindle, and double-reversible control mechanism provided in the main body and operated to control forward/reverse rotation of the longitudinal spindle relative to the main body.