Objective:,2,To analyze the tongue diagnosis image features of sub-healthy people with spleen-yang deficiency syndrome or kidney-yang deficiency syndrome, and explore the diagnostic value of tongue diagnosis image digital and quantitative features in the health status identification of spleen-yang deficiency syndrome and kidney-yang deficiency syndrome.,Methods:,2,A total of 1 450 sub-healthy subjects with spleen-yang deficiency syndrome, 1 666 sub-healthy subjects with kidney-yang deficiency syndrome and 1 844 healthy subjects were included and set as spleen-yang deficiency group, kidney-yang deficiency group and healthy group, respectively.The tongue diagnosis image information of the subjects was collected by the portable Chinese medical intelligent diagnostic instrument.The tongue image feature distribution and the tongue image feature parameters such as tongue color and coating color were compared among these groups.,Results:,2,①Compared with the healthy group, the ratios of pale tongue and dark red tongue in the kidney-yang deficiency group were increased(,P,<,0.05), the ratio of dark red tongue in the spleen-yang deficiency group was also increased(,P,<,0.05), the ratios of light red tongue, red tongue and white coating in the kidney-yang deficiency group and spleen-yang deficiency group were decreased(,P,<,0.05), and the ratio of yellow coating was increased(,P,<,0.05) .Compared with the spleen-yang deficiency group, the ratio of pale tongue in the kidney-yang deficiency group was increased(,P,<,0.05), and the ratios of red tongue and dark red tongue were decreased(,P,<,0.05) .②Compared with the healthy group, the ratios of fissured tongue, fat tongue body and thick coating in the spleen-yang deficiency group were increased(,P,<,0.05), and the ratios of fat tongue body and thick coating in the kidney-yang deficiency group were also increased(,P,<,0.05) .Compared with the spleen-yang deficiency group, the ratio of fat tongue body in the kidney-yang deficiency group was increased(,P,<,0.05), and the ratio of thick coating was decreased(,P,<,0.05) .③Compared with the healthy group, the L value of tongue color in the spleen-yang deficiency group and kidney-yang deficiency group was increased(,P,<,0.05), and the a and b values of tongue color were decreased(,P,<,0.05) .Compared with the spleen-yang deficiency group, the L value of tongue color in the kidney-yang deficiency group was increased(,P,<,0.05), and the a value of tongue color was decreased(,P,<,0.05) .④Compared with the healthy group, the L value of coating color in the kidney-yang deficiency group was increased(,P,<,0.05), and the a and b values of coating color were decreased(,P,<,0.05), the b value of coating color in the spleen-yang deficiency group was increased(,P,<,0.05) .Compared with the spleen-yang deficiency group, the L value of coating color in the kidney-yang deficiency group was increased(,P,<,0.05), and the a and b values of coating color were decreased(,P,<,0.05) .,Conclusion:,2,The characteristic parameters of tongue diagnosis image can be used as the objective reference indexes for syndrome differentiation and diagnosis and health status identification in sub-healthy people of spleen-yang deficiency syndrome and kidney-yang deficiency syndrome, which provides a new idea and method for Chinese medical health management in sub-healthy people.