A driving control system of an internal clutch comprises a cam; a first control unit for switching a power input to be from a planet gear frame or from an inner gear; the first control unit being by the cam through a first driving rod; a second control unit for controlling a sun gear to be at a power output state or at a releasing state; the second control unit being driven by the cam through a second driving rod; and a third control unit for controlling a power output to be from a planet gear frame or from an output power of an inner gear; the third control unit being driven by the cam through a third driving rod. The first, second and third driving rods are driven by the same cam so as to precisely control movements and moving sequence of the first, second and third control units.