The embodiment of the invention discloses a gesture image generating method and device and a storage medium. According to the embodiment of the invention, the method comprises the steps: obtaining a plurality of groups of conversion parameters, constructing coordinate conversion matrixes according to the plurality of groups of conversion parameters, and obtaining a plurality of coordinate conversion matrixes; obtaining the three-dimensional coordinate points of the positions of all articulation points forming a gesture according to the coordinate conversion matrixes; determining two-dimensional coordinate points of all articulation points according to the three-dimensional coordinate points of the positions of all articulation points; carrying out the marking of each articulation point according to the two-dimensional coordinate point of each articulation point, and generating a gesture image according to each marked articulation point. According to the scheme of the invention, the method achieves the automatic generation of the gesture image with each articulation point of the gesture being marked, does not need manual photographing and marking of all articulation points, and improves the gesture image generation reliability and convenience.