Gas diffusion visualization method and system

The invention discloses a gas diffusion visualization method and system. The method comprises the following steps: S1, acquiring gas diffusion parameters and the height of a to-be-observed gas diffusion surface, acquiring a plurality of diffusion points distributed on the to-be-observed gas diffusion surface at equal intervals and the gas concentration value of each diffusion point by utilizing aGaussian diffusion model, and constructing a diffusion point data array according to the position relationship of the diffusion points; S2, obtaining all triangular patch vertex indexes of the diffusion point data array; S3, drawing a triangular patch according to the vertex index of the triangular patch, and matching a color array; and S4, inputting the vertex data of all the triangular patches and the color array matched with each triangular patch into an OSG platform for rendering processing and displaying. The visualization detail precision is determined by the distance between diffusion points, and the smaller th