Fan device for a computer host

1. A fan device for a computer host comprising a rectangular container having an emplacement sink including an inner sink wall; a plurality of fans each of which have front and rear surfaces provided with a plurality of latch holes; and a plurality of positioning outer jackets made of rubber and capable of absorbing vibration, and each of the positioning outer jackets having a rear surface, a forwardly extending hollow pillar, an inward grove on the rear surface and a deep positioning hole extending into and through the hollow pillar and the hollow pillar inserted and latched into the latch hole, and a plurality of positioning inner jackets made by a hard material, and each of the positioning inner jackets including an outer ring fitted into the groove of the outer positioning jacket, and a pin inserted and tightly fitted into the positioning hole of the positioning outer jacket; and an exterior surface of the positioning outer jacket latched in the inner sink wall of the emplacement sink and wherein two sides of the rectangular container are provided with insertion holes and a bushing made of rubber and able to absorb vibration having a through hole in a center and being able to be inserted into the insertion hole and pillars installed on a bottom plate of the casing of the computer host and inserted into the through holes for positioning with the rectangular container being positioned on the pillars and wherein the two sides of container are provided with wind guiding holes being corresponding to leaves of the fans, whereas a side board of the casing of the computer host is provided with wind guiding holes for connecting with the wind guiding holes of the container.