The present invention relates to an apparatus for collecting and discharging whetstone dust for CNC whetstone-shaped multi-tasking machine, which discharges dust within a work space, wherein whetstone processed articles are processed by using a tool, from the CNC whetstone-shaped multi-tasking machine, which processes the shape of a whetstone, to the outside, comprising: a frame of the multi-tasking machine whose lower side has a dust discharge passage connected to a work space and an external air; a suction fan connected to an exit side of the dust discharge passage to transfer air and dust by power; and a dust collection unit, which collects dust, being connected to the exit side of the suction fan. In addition, the dust discharge passage is divided into a plurality of sections to control the absorption position and absorption volume in accordance with the directions of dust generation and dust scattering within the work space of the multi-tasking machine. Accordingly, the present invention is able to absorb and discharge the dust generated when the shape of the whetstone is processed by a tool through the dust discharge passage to the outside, to greatly reduce the accumulation of dust inside the work space, to reduce the inconvenience of frequently removing the dust, to rapidly discharge the dust in the work space to the outside, and to allow the worker to rapidly perform replacement of a whetstone processed article or the like in the work space.
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