The invention discloses a color correction method and device for a projector, and a computer storage medium. The method comprises the following steps: acquiring a target image formed by a first imagein a projection area; determining an initial color compensation value of a projection based on the first image and the target image; and calibrating the initial color compensation value based on the initial color compensation value to obtain a target color compensation value of the projection, and compensating an image to be projected based on the target color compensation value.