Method and system for generating face character detection model

The embodiment of the invention provides a method and a system for generating a face character detection model. The method comprises the following steps of for different face characters, selecting a character decision-making tree structure corresponding to the characters from face sample images respectively, wherein the character decision-making tree structure comprises one or more characters; converting the character decision-making tree structure into a sub-sum product network structure; taking the sub-sum product network structure of a plurality of corresponding characters and the character parameters of the characters as nodal points, combining into a mother sum product network structure, and deploying a weighted value for the side of the mother sum product network structure to obtain the detection model, wherein the character parameters are parameters for judging whether the characters exist, and the side of the sum product network structures is used for connecting the nodal points.