The present invention is applicable to the technical field of noise maps and provides a method for drawing a noise map and device, the method for drawing a noise map comprises: obtaining an environmental noise uploaded by a terminal, the environmental noise includes a noise value, a time information, and a position information; when the terminal uploads a picture corresponding to the environmental noise, detecting whether the picture is a valid picture or not; when the picture is a valid picture and the position where the picture is taken lies indoor, identifying the environmental noise as an indoor environmental noise; when the picture doesn't exist, identifying the environmental noise as an outdoor environmental noise, or when the picture is invalid, identifying the environmental noise as an outer door environmental noise, or when the picture is a valid picture and the position where the picture is taken lies outdoor, identifying the environmental noise as the outdoor environmental noise; drawing a noise map according to the indoor environmental noise and the outdoor environmental noise. The present invention can not only improve drawing accuracy of the noise map, but also increase reliability of the noise map.