Projection picture correction method and projection device

The invention relates to the technical field of projection picture display, and particularly to a projection picture correction method and a projection device, which are used for solving problems of a poor debugging effect, great difficulty and resource waste of a method for correcting the projection effect of the projection picture in a screen through frequent debugging of the projection device in the prior art. According to the embodiment, the projection picture correction method comprises the steps of obtaining projection of an entity screen which is projected in a sight plane of a camera through the camera; determining a rotating parameter and a translation parameter of the projection device based on the sight plane and the projection of the entity screen; and adjusting the projection device based on the rotating parameter and the translation parameter of the projection device. Consequently, correction of the projection picture which is projected to the entity screen can be realized just by rotating and translating the projection device based on the determined rotating parameter and translation parameter of the projection device, but frequent manual debugging of the projection device is unnecessary. Therefore, the projection device debugging difficulty is reduced, the debugging effect is improved, and the resource is saved.