The invention provides an indicating device and method for remote laser cutting aiming. The indicating device comprises multiple indicators, a first switch, a second switch, a third switch and a lithium battery; the indicators are arranged at the periphery positions taking a laser light outlet of a laser as the center, are of a symmetrical structure, are electrically connected with a built-in battery of the indicators simultaneously and emit colored warning light beams; and the laser emits a laser light beam for cutting. According to the indicating device, the safe visible light laser is used as an indicating laser; one way of indicating laser light is increased to four ways of indicating laser light, the four ways of indicating laser light are arranged in four directions taking the laser light outlet of the laser as the center, and therefore a warning boundary is provided while indicating is provided for the cutting laser light; the four ways of laser light are divided into two groups, the laser colors adopt green and red, the red indicating laser light represents warning, and therefore danger prompting is provided for operators and surrounding workers.