The invention relates to a multifunctional computer host device comprising a case main body, a drive motor and a heat dissipation box. The multifunctional computer host device is characterized in thatthe drive motor is disposed on the inner wall of the case main body; a rotating shaft of the drive motor is perpendicularly arranged on the inner wall of the case main body; a guide rod extending along the radial direction is disposed on the rotating shaft of the drive motor; a circular slide rail arranged around the drive motor is adisposed on the inner wall of the case main body; the heat dissipation box provided with a guide sleeve can be slidingly mounted on the circular slide rail; the guide sleeve is radially arranged along the circular slide rail; the guide rod and the guide sleeve arecoaxially arranged, and one end of the rotating shaft, far from the drive motor, of the guide rod extends into the guide sleeve; the drive motor drives the heat dissipation box to move along the circular slide rail by driving the guide rod to rotate; an outer shell of the case main body is arranged to be open at the top; the side wall of the outer shell is provided with an air port and also a cover plate which is covered on the opening of the top of the cylindrical outer shell; an upper air inlet provided with an upper filter net is disposed on the cover plate; an upper air inlet fan is arranged on the lower surface of the upper filter net. The multifunctional computer host device has the advantages of being not only high efficient in heat dissipation but also easy to lift and carry.