Abstract: The subject invention relates to yttrium aluminum garnet fluorescent powders with formula (Y3-x-yZxEuy)Al5O12 or (Y3ZxEuy)Al5O12, wherein 0<x≦0.8, 0<y≦1.5, and Z is selected from a group consisting of rare earth metals other than europium (Eu). The subject invention also relates to a pink light-emitting device, which comprises a light-emitting diodes as a luminescent element and a fluorescent body containing yttrium aluminum garnet fluorescent powders, wherein the diode emits a light with a wavelength ranging from 370 to 410 nm, which then excites the yttrium aluminum garnet fluorescent powders in the fluorescent body to emit another light with a wavelength ranging from 585 nm to 700 nm, so the two lights combine to produce a pink light. The subject invention also relates to the preparation of the yttrium aluminum garnet fluorescent powders.