With the expansion of surveying, mapping and navigation functions and the in-depth development of big data construction, the demand for surveying, mapping and navigation services for economic and social construction and emergency support is becoming more and more urgent. Based on the characteristics of the current emergency surveying, mapping and navigation support and the current status of the guarantee, this paper discusses the support demand, resource reserve, system construction and support mode, make the emergency support decision-making and implementation of measures more scientific and reasonable.