Abstract: To find out the influencing factors of geological environment and evaluate the suitability of underground space development in Hefei City,by studying the geological environment conditions, this study selects engineering geological condition, hydrogeological condition, stability of crust, ground and underground space conditions as the key factors of geological environment suitability assessment of underground space development. On the basis of the suitability evaluation of single factor underground space development, the weight was determined by Analytic Hierarchy Process, and the suitability evaluation of geological environment for underground space development within 40 m below the surface of Hefei City was carried out vertically and stratified with MAPGIS as the platform and fuzzy mathematics comprehensive evaluation method.The result shows that the geological environment suitability of underground space development within the depth of 40 m underground could be divided into three grades, suitable area, relatively suitable area and poor suitable area respectively. The suitable and relatively suitable areas in the depth of 0~5 m spatial domain account for 70.2%, the suitable and relatively suitable areas in the depth of -5 ~-15 m spatial domain account for 81.8%, the suitable and relatively suitable areas in the depth of -15~-40 m spatial domain account for 92.2%. It is considered that there are good underground space resources in Hefei City, and these potential underground space resources can provide guarantee for sustainable development of the city.