Distribution (county) of every species of Fagaceae in China was searched by plant professional websites, published papers and books. Geographic information System was used in the paper. Map of spatial distribution of genera was made by the county and Fagaceae of China. Number, area and perimeter of every patch were gotten quantitatively from the map. Shape index of patch, largest patch index, Shannons and Simpsons evenness indexes were calculated. Spatial distribution and its characters of every genus in Fagaceae were analyzed. It provided a basis for quantitative research of spatial distribution in flora. Results showed that: (1) spatial distribution of genera of Fagaceae in China is continuous area or area disjunction. There are scattered area, main and secondary area, and main area in area disjunction. Differences of spatial distribution in genera are showed by thematic map and quantitative data. (2) Distribution area and the largest patch area of genera of Fagaceae in China are in subtropical zone which locates in southern China. They distribute continuously to tropical zone, but patch occupies splitsite and small area in temperate zone. Flora in subtropical zone of China should be Paleotropic Kingdom. (3) Trigonobalanus, Castanopsis and Lithocarpus should be Trop. As. and Trop. Amer. Disjuncted according to their distributions in world and China.